Digital Libraries and Collaborative Knowledge Construction

Nancy A. Van House

To appear in: Ann P. Bishop, Barbara P. Buttenfield, and Nancy A. Van House, eds, Digital Library Use: Social Practice in Design and Evaluation, MIT Press, Fall, 2003.

 

            Effective digital library design is not simply a matter of converting existing information practices and artifacts to a digital world. Digital libraries (DLs) support cognitive or knowledge work. Designing effective DLs, then, requires understanding knowledge work and how DLs not only support but potentially change it. We must look at the work, its tools and practices, the people who do the work and the institutions that support it, and the interaction of all these with the DL. To say that we would understand all of this would be to aspire to too much in a complex and shifting world; but we can inquire with interest and reach some understanding that will help the continuing enterprise of knowing.

            Although there has been much discussion about user-centered design of information systems in general, and digital libraries in particular, a theoretical or conceptual base for such work has been lacking. In this chapter, I investigate the uses of irreductionist approaches to social theory, with an emphasis on situated action, science studies and science and technology studies, and actor network theory as bases for understanding, first, knowledge work, and then DLs. This chapter emphasizes three critical characteristics of knowledge work: it is situated, distributed, and social. That it is situated means that knowledge work is performed by specific people under specific conditions for specific purposes. It is distributed because it entails cooperation among people who don’t know one another, as well as among those who do, across space and time. In fact, some current approaches to learning (Lave and Wenger, 1991) argue that it is the community and not the individual that “knows.”  Finally, it is social because we work and learn together, and decide what and whom to believe and rely upon, in community. Much of what we claim to know comes, not from our own direct experience, but what others tell us is so, including our knowledge of whom to believe.

            This focus on the nature of knowledge work applies to DLs in two ways. First, documents and other information artifacts, publishing, and libraries are critical to knowledge work. The digital library, as a new entry into this array of artifacts and institutions, is affected by, and potentially changes, existing processes and relations. Second, DL design, construction, and maintenance are also a form of knowledge work, involving designers, implementers, and content providers, as well as users.

            This analysis is rooted in an empirical study of the UC Berkeley Digital Library Project, but it is not specific to any one DL. It addresses concerns raised by participants and non-participants in this DL about actual and potential changes in information production and use made possible by DL technology, not about the specific design and content of the Berkeley DL. Furthermore, I contend that these findings apply to many areas where information technology is changing the processes of knowledge work. I argue that these findings reflect, not just issues specific to one DL, or to DLs alone, but to the social and material practices of knowledge work and the changes brought about by the electronic distribution of information. The DL challenges existing practices of knowledge work, the boundaries of knowledge communities, and practices of trust and credibility, all of which are central to the creation and use of knowledge.

            The first part of the chapter reports on conversations with actual and potential users, contributors, and creators of the UC Berkeley DL, and discusses some of their concerns and problems. The second part begins the development of an analytical perspective from which to better understand these processes. It is rooted in situated action, science studies and science and technology studies, and actor-network theory (ANT). The final section considers the implications of this analysis for digital libraries.

            In this chapter, I argue that the DL is not simply a new technology or organizational form, but a change in the social and material bases of knowledge work and the relations among people who use and produce information artifacts and knowledge. I further argue that it crosses boundaries, from private to public and across work communities, in ways that are becoming increasingly common with networked information. Finally, I argue that the DL and its potential interaction with knowledge work, communities, and practices highlights critical issues of trust and credibility in the networked world. I then examine the implications for DL design and evaluation, and for other forms of networked information.


The UC Berkeley Digital Library

This paper draws on research conducted as part of the UC Berkeley Digital Library Project (http://elib.cs.berkeley.edu) (UCB DL), part of the Digital Libraries Initiative funded by NSF and others. This research was conducted during Phase I, which developed a work-centered DL supporting environmental planning. Its premise was that work groups require sophisticated digital library services and collaborative support to effectively utilize massive, distributed repositories of multimedia information; and that we need to understand the work and the work group to build DL services to support them. During Phase II, which began in 1999, the focus of the project has shifted; the content from Phase I remains, but has been expanded. This paper refers to the project as it existed under Phase I.1 This is only one of many digital library initiatives being undertaken at UC Berkeley and within the UC system.2 The UCB DL has developed tools for image retrieval, new document models, Web-based geographical information systems (GIS), distributed search, and natural language processing for distributed search. A major component of the project was and remains a substantial and diverse testbed of textual documents, photo images, data sets, and various kinds of geo-referenced data. It currently3 holds 165,000 photo images, nearly two million records in geographical and biological datasets, and 2,500 scanned documents comprising 300,000 pages of text for a total of over one terabyte of data.

            Much of the discussion in this paper refers to one major part of the testbed, called Calflora,4 a linked collection of botanical datasets containing descriptive information, photos, and diversity mapping for over 8000 vascular plants in California, and nearly 675,000 records of plant observations from 15 state, federal, and private databases. These records came in a range of formats in a variety of places. The size of this database of observations and its coordination with the other parts of the testbed make this DL significant for the botanical and environmental planning communities as both a resource and a model.

Interviews

The premise of the user needs assessment and evaluation component of the UCB DL is that, to design DLs to support work, we must first understand that work (Schiff, Van House, and Butler, 1997; Van House, 1995; Van House, Butler, Ogle, and Schiff, 1996; Van House, Butler, and Schiff, 1998). We investigated the practices of environmental planning, particularly those of information use and production; the information artifacts used and produced; and the possible effects of a Web-based digital library. More generally, our goal has been to better understand distributed, collaborative cognitive work, the role of information and information practices and artifacts, and the potential effects of digital information.

            This chapter reports on a particular aspect of this research, issues related to the sharing and use of digital data that arose during interviews5 with two different communities. The purpose of these interviews was to learn about environmental planning and its use and production of information and information artifacts. The interviews were not about the UCB DL per se so much as about the potential of DLs in general, including the UCB DL.

            One set of interviews was with people engaged in work related to water planning in California. Participants included employees of various state, local, and federal agencies, private consultants, members of the public, and people from a range of professions, including engineering, hydrology, biology, computer science, and planning. In earlier papers drawn from these interviews, we described the social world of water planning (Schiff, Van House, and Butler, 1997; Van House, 1995; Van House, Butler, and Schiff, 1998).

            The second set of interviews was with people whose work was associated with the botanical datasets included in the UCB DL. We interviewed people in state and federal agencies, nonprofit research institutions, and within the University of California. With them we discussed a range of issues related to current efforts to make biological data available at UC and elsewhere.

            These groups6 share some important characteristics. Neither is homogeneous with clear boundaries. Both fields consist of multiple scientific disciplines engaged in coordinated work and sharing data, but with different knowledge bases, interests, methods, and terminology. Both include people working in state, federal, and local government and non-profit and commercial organizations doing research, planning, and applied work. Both have at least some involvement in decisions about land and water use that are often highly political7 with potentially great impact on the environment and economy (e.g., housing development, agriculture, timber harvesting, and recreation).

            Both rely heavily, at least for some purposes, on large datasets of records of observations and specimens, and summaries and analyses using these records. The records come in many forms and formats, from a variety of sources, collected over a long time by people with varied backgrounds, training, and interests. For example, to retroactively establish a baseline to determine changes in an ecological community, researchers may search out and correlate data about a particular geographic area collected over many years by different observers for a variety of purposes. Fine-grained data, such as the location of individual plants in a particular area, is often available only from local, sometimes nonprofessional, sources, while higher levels of government are often the source of higher-resolution data, such as aerial photos or statewide resource surveys.

            In both fields, computing and telecommunications enable access to large datasets that were previously difficult to share. These linkages have accelerated recently with developments in digital libraries and the Internet.


Interview Findings

This section reviews issues raised in the interviews about the willingness of individuals, organizations, and knowledge communities to contribute to and use information from the DL, and to participate in the DL’s creation and maintenance. The interviews revealed concerns about DLs and their relationship to the situated, distributed, and social nature of knowledge. The following section presents an analytical perspective on knowledge work that can help us understand the issues raised in the interviews and DLs’ role in the shifting processes of knowledge creation and trust.

DL Contributions. Identifying and acquiring content for a DL like the UCB DL, which does not begin with a pre-existing collection or even a specific user community, and includes both unpublished and published information, requires that some information producers agree to have their content included. It also requires that information be indexed, synthesized, and correlated. For example, the Hrusa California Plant Synonyms, a comprehensive table tracking changes in California plant names created by a single researcher and made available to the DL, is indispensable for coordinating multiple databases of botanical specimens and observations.

            In the interviews, we found a generally high level of interest in sharing data. In particular, local environmental and government organizations, who often have difficulty disseminating their work, saw the DL as a way to reach a wider audience.8 But we also found many concerns, especially about access to unpublished data.

            Previously, much of the data for which respondents were responsible was available to others mainly in summary form. Raw data were available directly from the data owners, on site or remotely, or within a professional community, e.g., through closed ftp. These social and technical barriers limited the data to people within a professional community, or those who had dealt directly with the data owner, who could screen requests and explain the data and their limits. Now such data can be made available to anyone. However, the possibility of open access raised several concerns among respondents. I will focus on three: fear of possible misuse of data, especially by people outside the professional community; the burden of making data available to others; and the hazards of making visible previously-invisible work.

            The first concern is “inappropriate use” of the data. Data available via the Internet may be used by people with interests, training, or expertise different from the data’s producers. A widespread concern in water planning interviews, in particular, was that uninformed users would download and use a snapshot of a changing dataset, misinterpret the data, combine datasets inappropriately, run unsuitable analyses, or otherwise misuse the data. For example, fish populations are measured by netting a sample. Projecting from the netted sample to a population is complex. The time of day and year, weather conditions, type of net, depth, and many other conditions affect the catch; and various models may be used to project a population from a sample.

            The next two sets of concerns relate to what one respondent called “productizing” one’s work. Sharing data requires work: cleaning the data, and creating documentation and metadata. One respondent said, “The Web...has made a lot of our scientists realize that they are [information] providers, and take much more seriously the notion that they have obligations.” Those obligations may not be welcome to either the researcher or the institution. Creating and maintaining data is often considered preliminary to the “real” work of research. Making it available to others takes time, effort, and sometimes different skills. It may be inconsistent with the researchers’ or organization’s priorities. And it may primarily serve the needs of people in other organizations.

            “Productizing” one’s work may make previously invisible work visible (Star and Strauss, 1998). Sometimes this is desirable; giving workers credit for workload and skill, for example. But it may make a person accountable in new ways. For respondents, making available the data underlying their analyses may allow a critic to redo or refute them: as one respondent said, “use our data against us.” For example, we learned that water supply projections are derived from a large number of measures and data points collected over space and time. The process of incorporating the data into models to generate forecasts is not mechanical. Forecasters exercise considerable judgment about which observations are accurate, how to massage the data, and which forecasting models and assumptions to use. Opening up the datasets to scrutiny opens up the entire process of generating supply projections.

            Two findings are worth emphasizing here. One is the potential problems in crossing boundaries (Marshall, this volume; Star, 1989; Star and Griesemer, 1989): making data available to and from people in other professional or practice communities, and making public what was private. The distributed nature of knowledge work means that people are continually sharing work, whether with people they know or impersonally through publication. But this sharing generally takes place within social, organizational, and professional boundaries, helping to ensure appropriate understanding and use and reciprocity. The DL has the potential of de-contextualizing information and making it more readily available outside of the social world within and for which it was produced. The other finding that I want to stress is the need for at least some DLs to actively solicit people’s participation, to win their trust and to align with their interests.

Using the DL

Now we turn to some factors that affect people’s willingness and ability to use DLs. The literature contains many discussions of factors influencing people’s adoption of new technology; a DL is not simply a technological artifact, however. It is an information resource. Nor is it exactly analogous to a traditional library.

            Three possible differences between DLs and physical libraries are particularly relevant to this discussion. First, traditional libraries are closely tied to the publishing system, Chartier’s (1994) “circuit of the book.” The publishing system provides review and quality control, giving users some imperfect but indicative assurances about the sources, credibility, and appropriate uses of information. However, some DLs may provide access to previously-unpublished information, placing them outside these established institutional safeguards.

            Second, traditional libraries are established institutions and librarianship a respected profession with selection policies and procedures, standards of performance, and a code of objectivity. Some DLs are affiliated with traditional libraries and/or staffed by professional librarians; many are not.

            Third, a DL contains content, technology, and functionality, all of which users must be willing to trust if they are to rely on the DL as a source of information and possibly an aid in analysis, and incorporate the work of others, carried by the DL, into their own. The UCB DL provides innovative functionality, the ability to manipulate and recombine data in a variety of ways. For example, it includes a GIS function, the ability to select, map, and overlay geo-referenced data from unrelated sources.

            Using published sources, data collected by others, or even technology designed by others is an act of trust. Shapin (1994) demonstrates that the distributed nature of knowledge work makes it a collective good. Much of what we claim to know is rooted in what we have been told by others, including what we have learned about who or what to trust, and how to evaluate the trust-worthiness of sources. Even in science, which purports to ground truth claims in direct experience, he shows that knowledge is grounded in the community’s prior knowledge, its instruments and methods of observation and argument, and its assessment of competing knowledge claims. “We rely on others...[T]he relations in which we have and hold knowledge has a moral character, and the word I use to indicate that moral relation is trust.” (Shapin, 1994, p. xxv, emphasis in the original.)

            Users of any library have to assess the quality and credibility of its contents. This is an assessment, partly of the library as an institution or collection (e.g., a medical school library will have different health information from a public library), and partly of the information resources themselves. Users often take for granted the trust-worthiness of a library, based on their knowledge of the institution: a university library, for example, is assumed to adhere to collection development standards and procedures that, to some degree, warrant its contents.

            Assessing the credibility of information is not easy. For example, a steady trickle of email arrives questioning or “correcting” identifications of the UCB DL’s flower images. No doubt some of the original identifications were erroneous. But assessing the correctness even of something as factual as plant identifications is complex. Some species can only be positively identified under a microscope. Other differences may be due to changes in plant taxonomy over time: names change; the boundaries between species and subspecies move; new species or subspecies are defined.

            How does a user assess the credibility of information? A forest ecologist took us through her criteria for plant identifications. A record of a sighting is less credible than a specimen in hand. A report of a species in an unexpected place is less plausible than one from a place where it is common. She also considers the expertise of the person making the identification. She knows that some people are experts in a geographical area; she’ll trust their identification of species common to that area, but not necessarily rare species. Others are experts in a species, and she’ll trust them on that species and subspecies wherever they may occur. In other words, she judges the professional skills of data providers--directly or indirectly--to determine the credibility of the data.

            We found that knowledgeable users consider, not just the data providers’ expertise, but their interests. The naive ideal of objectivity in data collection and analysis quickly broke down in politically-charged discussions about such issues as water planning with people from, say, resource extraction industries and environmentalists. Many choices are made in collecting, analyzing, reporting, and interpreting data that reflect particular groups’ interests and expectations (Wood, 1992). People knowledgeable about (and suspicious of) information providers’ interests factor those in when assessing credibility.

            How might a DL assist users in assessing data quality? First, a DL generally exercises informed judgment in the selection process. Collection-level assessments are made of which botanical data to include in the UCB DL. Some in the user community have argued, however, that every image or record should be reviewed by an expert. However, this would require considerable skilled labor and the UCB DL does not do this.

            Second, a DL can provide informed users with information about the source. The UCB DL links each botanical observation to its source and whatever metadata are provided. This shifts the burden of assessment to the user–which may not help the inexpert user, but may be invaluable to the expert like our forest ecologist.

            DLs provide not only content but functionality. This includes search tools: the DL’s interface may act as an aid or a barrier between the user and the collection. The UCB DL also performs operations on the data, such as GIS (geographical information system) overlays, where graphical representations of multiple datasets are laid over the same geographical substrate. In GIS, which data can be overlaid, the level of resolution, even the choice of colors affects the interpretation of the results. Wood (1992) shows how maps, which appear to be simple representations of a territory, reflect interests by the choices of what is represented and how. Interestingly, these issues about trusting a DL’s functionality were raised, not by users, by UCB DL designers with expertise in the applications area, probably because they knew the most about the possibilities chosen and those missing.

            In sum, in understanding knowledge work, we need to be concerned with how people decide whether to trust others’ work and to incorporate it into their own, and how the DL supports or undermines these processes. By removing information from its original setting, the DL may strip it of the contextual indicators needed to interpret, assess, and use it–the knowledge of sources, methods, terminology, the assemblage (Watson-Verran and Turnbull, 1995; Van House, Butler, and Schiff, 1998) of people and practices that marks the work of a community.


Creating and Operating the DL

DLs require contributors and users, but also designers, builders, and operators of many different kinds. The UCB DL, like many, is both a research project and an active testbed. Many DLs are collaborative projects among researchers, user communities, librarians, and technologists. Participation by at least some of these people may be voluntary.

            Two major sets of interests to be reconciled in a DL like the UCB DL are computer science researchers and staff, and content area specialists, who are both information providers and users. The DL may be something different to each. Computer scientists, for example, tend to emphasize technological innovation, whereas users are more interested in content and stable, reliable functioning. An interviewee from a natural history museum said that he had seen problems on similar projects “because the computer scientists are interested in blazing issues in computer science, because that’s what’s going to make them famous, and we on the content side are trying to shovel mounds of [data] and it doesn’t flow down well.” He went on to say, “This gets into the political agendas of what serves any participant in this project best and how we can devise a work plan for a project that is going to give everybody the right benefits out of it. What we need to end up with here in the museum is with more stuff digitized and with systems that enable us to manage, capture, maintain it after the project has run its course. We have certain limitations in the toolsets that we will be able to cope with.”

            Such differences are not unique to the UCB DL. Weedman (1998) studied the Sequoia project, a research project that developed computer-based tools for earth science research. She found differences between the earth science research community, who wanted a reliable, working system, an incremental improvement over existing tools, requiring minimal effort on their part, and computer science researchers who wanted to be at the cutting edge of their field. These differences are likely to surface in the choices about development priorities, content, functionality, the speed with which changes are introduced, and attention to user-friendliness.

            Another source of tension is that participating disciplines may have different norms and styles for decision-making. Many computer science projects, and many Web-based projects, are highly democratic and decentralized. Whoever is willing to contribute is welcome. A member of the DL’s technical staff noted differences between computer science and the botanical community over how much effort (and delay) to put into making a “right” decision versus getting something up and running and dealing with problems later. Of course, it is dangerous and perhaps unfair to generalize about two research communities from these comments; what is significant is that some key participants believed that such differences existed. It seems reasonable to expect differences between participants focused on the technology and those focused on content and functionality in their assessment what is good enough to make publicly available. Problems with content and functionality are likely to be more distressing to members of the user community.

            While the most visible differences may be over major decisions, another issue is articulation work (Star and Strauss, 1998): tuning, adjusting, monitoring, and managing the consequences of the distributed nature of work, the interplay between formal and informal. Articulation work is almost always invisible (especially when it is done well), and because of this is often overlooked in technological innovation. In traditional libraries, librarians do the articulation work, whether it is ensuring the integrity of the collection or helping users locate information when the tools fail. In research DLs, there may be judicious discussions about major policy decisions, but then a lack of attention to articulation work.

            In the UCB DL document intake process, for example, the work of creating metadata for documents was initially left to the student assistants doing the scanning. In time this was seen to be problematic, and a form was created for document providers to report metadata. However, libraries know well the problems of inconsistency that come from having metadata assigned by multiple people.

            In sum, then, DLs balance multiple interests. In some DLs, information providers must be willing to allow their work to be included, to be used, possibly by people from other knowledge communities whose understanding and practices may differ from their own. Participants must be willing to use—to trust--the DL’s contents, which may include documents, data, and other representations not available through the more traditional channels of publishing and libraries, and without the warrants that these institutions provide. The DL provides not simply contents but also functionality: minimally, to search and filter the DL’s contents, but in some cases to operate on, recombine, and otherwise manipulate the contents, often in ways that are not transparent to the users. Finally, the design, implementation, and operation of the DL often requires the work of different professional groups, such as computer scientists, librarians, and members of the targeted user communities, each with different interests and priorities for the DL.

            DLs participate in, are affected by, and potentially change the relations among the people, artifacts, and practices of knowledge work, which is situated, distributed, and social. The DL itself, furthermore, is an instance of distributed work that requires balancing the interests and knowledge frameworks of multiple communities.

            To design and evaluate DLs, then, it would be useful to have an analytical base for understanding issues of knowledge creation, use, and trust; of crossing of boundaries between public and private, and across knowledge communities; and of cooperation in the creation of sociotechnical systems such as DLs.


Understanding Knowledge Work

Up to this point, this chapter has been concerned with findings from interviews with participants and potential participants in the UCB DL, with reference to this DL and to the more general possibilities of sharing digital data. This section presents a framework for understanding these findings in the context of knowledge work and DLs as sociotechnical systems. It draws on three related analytical approaches: situated action/practice theory, based primarily on the work of Jean Lave and Etienne Wenger, science studies and science and technology studies; and actor-network theory. In the interests of space, we will concentrate on the aspects of these approaches, individually and collectively, that are most relevant to the present discussion. The following section then applies this approach to the empirical issues described above.

            All three of these approaches are to some degree “irreductionist” frameworks (Kaghan and Bowker, 2000), according to which social order is not pre-existing but is continually produced and reproduced through people’s ongoing, practical action, the concrete, day-to-day activity and interaction. The emphasis is on the processes by which order is (re)constructed, and on the practices and artifacts that carry and shape understanding and activity across time and space.

            In the situated action approach of Lave and Wenger (Lave, 1988, 1993; Lave and Wenger, 1991; Wenger, 1998), learning is a dimension of social practice. Theories of social practice emphasize the interdependence of the person and the world. Learning concerns the whole person acting in the world, as a member of a sociocultural community. “Learning, thinking, and knowing are relations among people and activity in, with, and arising from the socially and culturally structured world” (Lave and Wenger, 1991, p. 50). Knowledge is not an inert substance transferred from teacher to student. It is a complex social and material phenomenon, a "nexus of relations between the mind at work and the world in which it works" (Lave, 1988, p. 1).

            Practice–concrete, daily activity–is critical to knowing. Information artifacts, including texts and images, are not simply reflections or carriers of knowledge. They shape and reflect practice, and are instrumental in creating and re-creating knowledge, as well as coordinating work across space and time.

            Knowledge, practices, and artifacts are tightly bound up with the knowledge community or community of practice (Lave & Wenger, 1991; Wenger, 1998). People learn and work within groups who share understanding, practices, technology, artifacts, and language. Communities of practice include professions, workgroups, and disciplines, as well as less-easily-labeled groups.

            The recognition of trustworthy sources is a necessary component of all systems of knowledge and knowledge communities (Shapin, 1994). Our perceptions are located within “hierarchies of credibility” (Star, 1995, citing Becker). An important task of knowledge communities is establishing these hierarchies: deciding what is known, the processes and principles by which knowledge claims are evaluated, who is entitled to participate in the discussion, and whom to believe.

            In our society, science is considered the prototype of rational knowledge construction and validation. Science studies9 and science and technology studies (STS) investigate the culture and practices of science and technology, and how it is decided what is known, including how hierarchies of credibility are created and participants attain their places in them. The approaches subsumed by science studies and STS vary, but they share a contention that scientific and technical knowledge is determined, not entirely by nature, but also by social influences. This does not mean that knowledge is simply a product of social agreement. But this approach challenges the traditional boundaries between nature and society, science and politics, and knowledge-creation practices in science and in other areas of knowledge.

            STS is further concerned with how sociotechnical systems–systems of people, technology, and practices–are created and maintained. It takes the stability of such systems as something to be explained rather than taken as given.

            Actor-Network Theory (ANT)10 originated within science studies and STS with ethnographic studies of science laboratories and the processes by which reputations were built and resources garnered via the practical, daily work of the laboratory (e.g., Latour and Woolgar, 1991). ANT sees power and order as effects to be explained. ANT argues that action at a distance and mobilization of allies are critical to the development of scientific knowledge, establishment of credibility, and acquisition of resources, and that inscriptions (including texts, images, graphics, and the like) play a key role. It has also been concerned with explaining the stabilization of sociotechnical systems, which it describes as temporary, changing heterogeneous networks of resources

            ANT has its shortcomings.11 Our purpose here is not to “do” ANT but to see how it may help us to understand DLs as sociotechnical systems, and as collections of inscriptions used to act at a distance. To better understand ANT and how it may apply to DLs, and to our interview findings, we need to go through some of its elements.

            The basic ontological unit of ANT12 is the actor-network, which is “most simply defined as any collection of human, non-human, and hybrid human/non-human actors who jointly participate in some organized (and identifiable) collective activity in some fashion for some period of time” (Kaghan and Bowker, 2000). ANT is concerned with how these pieces are held together, as organizations, social institutions, machines, and agents, at least for a time. Perhaps the most radical contribution of ANT is the inclusion of the non-human: according to ANT, networks are heterogeneous, composed not only of people but of machines, animals, texts, money, and other elements.

            Translation is a key process by which actor-networks are created and stabilized, however temporarily. Actors’ disparate interests get translated into a set of interests that coincide in the network. For example, in Callon’s (1986b) study of the development of electric vehicles, the producers of vehicle bodies and of fuel cells both had to see their interests as being served by the electric vehicle to be willing to research and produce the needed components. Without their involvement, the vehicle could not be build.

            Black-boxing is a process of closing questions and debates. Participants agree to accept something as given. Ideas, knowledge, and processes can all be black-boxed, at least temporarily, at least for some people. “Standard” research methods, for example, get black-boxed within research communities. What is black-boxed for some groups may not be for others, e.g., different research communities may have different standard methods.

            Finally, “an intermediary is an actor (of any type [i.e. human or non-human]) that stands at a place in the network between two other actors and serves to translate between the actors in such a way that their interaction can be more effectively coordinated, controlled, or otherwise articulated” (Kaghan and Bowker, 2000). Because networks are never completely stabilized, translation and black-boxing are continual. This is the work of intermediaries.

            Inscriptions are an important kind of intermediary in ANT. Knowledge, according to ANT, is not abstract and mental. It takes material form: inscriptions such as journal articles and patents, conference presentations, and skills embodied in scientists and technicians. “The actor-network approach is thus a theory of agency, a theory of knowledge, and a theory of machines” (Law, 1992, p. 389). Inscriptions play an important role in scientific and other regimes of knowledge. Modern information technology, beginning with the printing press, has made possible the immutability and mobility of inscriptions, allowing people to send their work and arguments across space and time, and to gather, compare, combine, contrast, summarize, and refute others’ work.

            Another kind of intermediary of interest in the present discussion is the boundary object. Star and Griesemer (Star, 1989; Star and Greisemer, 1989) noted that scientific work has always required information that can be used by multiple users and communities for a variety of purposes, retaining its integrity across space, time, and local contingencies without losing its specific meaning in a local setting. To explain how this works, they propose a model based on symbolic interactionism’s “social worlds” theory. Instead of a single actor trying to funnel others’ concerns into a narrow passage point, they argue for multiple translations, entrepreneurs from multiple, intersecting communities of practice, each trying to map their interests to those of the other audiences in such a way as to ensure the centrality of their own interests. One place these interests come together is in a boundary object.

            They describe boundary objects as both plastic enough to adapt to local needs and have different specific identities in different communities, and robust enough to maintain a common identity across sites, and be a locus of shared work. They identify several types of boundary objects, one of which is of particular of interest for the present discussion: repositories, which they describe as “ordered piles of objects indexed in standardized fashion” (Star and Greisemer, 1989, p. 408). Their example is the University of California, Berkeley, Museum of Vertebrate Zoology (MVZ), a collection of specimens of amphibians, birds, mammals, and reptiles, with extensive, standardized metadata, including such information as descriptions of the location and conditions under which specimens were collected and by whom. (The MVZ’s specimen records, coincidentally, are now accessible through the UCB DL.)  Star and Greisemer’s account of the creation of the MVZ shows how the interests of the director, major funder, collectors, trappers, and university administrators came together to create an impressive array of specimens of California flora and fauna with standardized descriptive information, to be used by a variety of scientific disciplines for many purposes.

            Situated learning has profound implications for the design of information systems. Our ideas about knowledge creation and use and information transfer are rooted in our assumptions about learning. The very phrase “information transfer” implies that information is a thing that can be transferred. If learning is rooted in practices, artifacts, and communities, then information systems have to be co-constituted with these, as well. If knowledge is tightly bound up with a community of practice, then information systems have to be aligned with communities of practice. At the very least, we have to look more carefully at the social aspects of knowledge and the role of information artifacts such as documents in practice and in communities of practice. In particular, we have to consider how DLs both support the recognition of trustworthy sources, and are evaluated as trustworthy themselves.

            Science studies, STS, and ANT are relevant to the UC Berkeley DL and DLs in general in a number of ways. First, much of the content of the UCB DL is scientific; most of the interviewees do work that is to some degree based in science. The practices of scientific work and of credibility are relevant to interviewees’ concerns about sharing of data.

            Second, as we have said, science is often considered the prototypical system of knowledge. Furthermore, ethnographic studies of science have concluded that what scientists do is not fundamentally different from ordinary activity (Latour, 1987; Latour and Woolgar, 1991). I contend that much of what has been learned in science studies probably applies to other knowledge communities and to digital libraries and other digital information generally. In particular, the recognition of trustworthy sources is a universal issue.

            Third, STS and ANT are concerned with the building and maintenance of sociotechnical systems; DLs are sociotechnical systems. The UC Berkeley DL consists of technology, texts, images, databases, functionality, users, contributors, funders, designers, builders, operators, and more. ANT may provide us with resources for understanding people’s willingness (or unwillingness) to use and contribute to the DL and its inscriptions, and to participate in the DL’s creation.

            Fourth, ANT addresses the role of inscriptions in translation and action at a distance, the establishment of credibility and order, and power (e.g., Latour, 1986; Law, 1986). DLs substantially affect the creation, circulation, and combination of inscriptions.

            Finally, I contend that DLs are boundary objects. The UCB DL is an ordered, indexed repository of publications, images, and records of specimens and observations, of catalogs, indexes, maps, and mapping functionality. It has different identities in different communities (e.g., a repository of documents and records; a testbed for technology development), but a common identity across sites (the UCB DL). And it is the locus of multiple, simultaneous translations, as the different communities find in it their interests, and seek to enroll others to help create and maintain the DL in ways that support their interests.


Understanding Digital Libraries and Knowledge Work

Now let us look again at participants’ concerns about contributing content to a DL, using it, and participating in its creation and maintenance in the light of the discussion so far.

            The DL is a locus of shared work of two kinds. First, building and maintaining a DL involves a variety of groups who contribute content, do the work of design and operation, and use it. Second, the content of a DL supports the shared work of information providers and users. Botanical databases, for example, are used across communities doing botanical and other kinds of environmental work. The DL is the “host,” so to speak, of other boundary objects such as databases.

            The power of the DL is in the integration of its heterogeneous elements, that is, its nature as a sociotechnical system, its usefulness to multiple professional communities. This integration, however, creates difficulties and conflicts as each participating group places its own concerns at the center and seeks, in ANT terms, to enroll others – or at least participates only as long as its interests are met, as long is it is willing to be enrolled. ANT warns us that network stability must be explained, not assumed; that networks tend to come apart. Some of the tension that shows up in the interviews--including differing priorities between technologists and content-area specialists, and concerns about the effort required of data providers--are a reflection of this tendency toward instability. They reflect, not problems to be solved once and for all, but expected and on-going tensions in the DL as a dynamic locus of multiple translations.

            The flexibility created by DLs is a major reason for building them. But this same flexibility may destabilize the processes and standards of knowledge creation. In science and technology, as in other areas, knowledge work is performed within an interdependent network of previous work, methods, tools, and colleagues – assemblages of people, practices, tools, theories, standards, publications, social strategies, and the like that are dynamically, mutually constituted in and by knowledge work (Watson-Verran and Turnbull, 1995; Van House, Butler, and Schiff, 1998). Inscriptions play a key role in the creation of knowledge, and the processes by which knowledge communities decide what and whom to believe, interests are translated, and networks are stabilized. Hierarchies of credibility are created within communities of practice; there too inscriptions are most easily understood (see, for example, the discussion of genres in Agre, 1998). But DLs enhance the ease with which inscriptions cross community boundaries, making Latour’s “immutable mobiles” even more mobile–perhaps too mobile, when respondents worry about their data being misused by people without the needed professional qualifications.

            Crossing the boundaries of knowledge communities may call into question that which is taken for granted within communities, opening black boxes, and challenging the established cognitive order. Hence the concerns in the interviews about misuse of data or the inclusion of data from unfamiliar sources. Shared practices and understandings can no longer be assumed; the indicators of credibility may be questioned or missing; users may not know how to assess credibility; inscriptions may be used in ways not envisioned (or accepted) by their creators. The DL potentially destabilizes the processes and the hierarchies of credibility and power relations.

            Furthermore, the DL can challenge inscriptions’ immutability (Levy, this volume). The DL is not simply a repository of inscriptions, a passive container or conduit; it makes them more manipulable and combinable; it even makes new kinds of inscriptions possible. The UCB DL, for example, allows the user to take a published table and re-organize it; for example, a table of dams arranged alphabetically can be re-ordered by size. The concerns about data being misused, for example, include fears that the “black box” of an inscription such as water supply forecasts will be opened, the modeling replicated with different assumptions, and the forecasts challenged.

            Of course, the originator never retains control over his or her inscriptions. But the DL allows them to move even more freely; it may enable more fluid re-combinations of them; it may even open them up in ways not possible before.

            The DL opens some black boxes but it may close others. For example, its analytical and search tools may be opaque to the user, making it difficult for the user to understand, evaluate, and trust what the DL is doing.

            In sum, then, the DL is not simply a passive repository of inscriptions. By potentially changing the mobility and mutability of inscriptions, it may challenge the established order and de-stabilize the network of relations. It becomes a participant in the processes of knowledge creation and the establishment of trust and credibility.


Implications For Digital Library Design, Management, And Evaluation

In this chapter, I have been concerned with better understanding knowledge work, its social and material practices, and their interaction with the digital library. I argue that electronic distribution of information potentially challenges existing practices of knowledge work, boundaries of knowledge communities, and practices of trust and credibility, all of which are central to the creation and use of knowledge and the stabilization of the cognitive order.

            I have emphasized three characteristics of knowledge work and their implications for DLs. Because knowledge work is situated, DLs have to articulate with the contexts and practices of specific knowledge communities. Because it is distributed, DLs support the coordination of work across space and time. And because it is social, they are entangled in the processes by which communities collectively decide what they know and whom to believe.

            This focus on knowledge work applies to DLs in two ways. First, digital libraries support users’ knowledge work, so understanding knowledge work will help us to ensure that DLs are useful and used. Second, DL design, construction, and maintenance are also a form of knowledge work, so this understanding may help to ensure that DLs are sustainable (Lynch, this volume).

            The DL is not simply a new technology or organizational form, but a change in the bases of knowledge work and its network of social and material relations. The DL may cross boundaries, from private to public and across knowledge communities, in ways that are becoming increasingly common with networked information. Finally, the DL and its potential interaction with knowledge work, communities, and practices highlight critical issues of trust and credibility in the networked world.

            A digital library is a heterogeneous network of users, researchers, funders, operators, and other people; of documents, images, databases, thesauri, and other information artifacts; of practices and understandings; and of technology. It is a boundary object, both created and used by different communities for different purposes. It is the locus of multiple translations as various participants try to enroll others to ensure that the DL meets their needs. It is an active participant in the creation and circulation of documents, images, and other kinds of inscriptions.

            This understanding of DLs has implications for DL design, management, and evaluation, and for our understanding of knowledge work and communities. First, it suggests that the work of translation is on-going in DLs. The problems and tensions identified in these interviews are indicative of the dynamic tension among the DL’s participants. We cannot expect a DL to settle into an easy equilibrium of interests. We can expect conflicts, compromises, and jockeying for advantage among various stakeholder groups to be a continual part of DLs.

            Second, it cautions us to be sensitive to the variety of communities’ existing practices of knowledge creation and work and indicators of credibility. A successful DL has to fit with these practices. In particular, the DL has to articulate with participants’ hierarchies of credibility and processes of establishing trustability for people to be willing to use and contribute to the DL. And these vary across communities of practice.

        The world and the work that the DL serves are continually changing; so too must the DL. Its design needs to be deliberately fluid and dynamic, to accommodate emergent work practices, and on-going enrollment and co-constitution.

        There is currently much discussion about involving users in the design of technology, but how (and whether) it is done varies. This analysis suggests that high-order user involvement in DL design is critical. Only members of the knowledge community fully understand the complexity of their network of practices, tools, and participants, including their processes and criteria of credibility, and how the DL might interact with them. However, the question of who is to be involved, which communities, can become even more uncertain–if both the value and the threat of DLs is in their ability to cross the boundaries of communities of practice, which communities are involved and how are their differences reconciled?

        Understanding the DL as a boundary object helps us understand some of the on-going tension between generality and specificity in DL design. But it also helps us to see DLs as continuous with past boundary spanning practices in science and other areas. A DL designed for specific communities and tasks can mesh with the methods, genres, understandings, and language of a specific communit –and support existing and emergent practices of trust and credibility. But a major value of DLs is their ability to cross communities and tasks. Furthermore, customization is costly. For whom will the DL be customized? Which group’s interests will dictate design decisions?

        The implications for DL evaluation are several. The DL needs to be evaluated, not just for how well it performs its intended functions and meets targeted users’ identified needs, but for its interaction with work, practices, artifacts, and communities. Evaluation needs to be targeted to specific user communities and tasks, with the understanding that DLs are different things to different groups. This makes evaluation more complex and uncertain, but also more realistically aligned with users’ concerns and with the changing array of users and other stakeholders.

        Evaluation needs to address, not just service delivery, but also the organizational issues around the creation and maintenance of the DL, the stabilization of the DL as a heterogeneous network, and the on-going enrollment and coordination of resources and participants. A DL without users is a failure, however good its technology and its contents.

        Common to science studies, STS, and ANT is a reliance on ethnographic research methods, the study of activities in their natural settings, of what people actually do as well as their own accounts of their behavior. The appropriate methods of evaluating DLs are varied (Van House and Bishop, this volume), but ethnography is certainly central.

        I argue that these findings reflect, not just issues specific to one DL, or to DLs alone, but to the social and material practices of knowledge work and the changes brought about by the electronic distribution of information. DLs challenge existing practices of knowledge work and boundaries of knowledge communities, both of which support the interpretation and understanding of information and the assessment its trustability. DLs raise questions about much that we take for granted in knowledge work. Taking these questions seriously will help us to better understand these communities and their work,and their relationship to artifacts and technology, and to design better DLs.

        Two areas to which this analysis might be extended are knowledge management and the growing problem of trustability of Internet-based resources. Knowledge management is concerned with making better use of organizational knowledge resources. It often tries to de-contextualize knowledge and information artifacts, “re-purposing” them, to use one of the uglier neologisms. But potential users need to be able to understand the information’s context to assess its credibility and appropriateness for their needs. Similary, the Internet has made a vast amount of information of uncertain provenance accessible to people who may lack the expertise to evaluate it, medical information being a prominent example. Both are areas where information is crossing boundaries in ways that challenge its interpretation and assessment, and where attention to existing practices of information activity and cognitive order, and especially of trust and credibility, may help us to design better information systems.


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NOTES

1. Phase I funding for the UCB DL came from the NSF/NASA,/ARPA Digital Libraries Initiative.  Currently, the UC Berkeley Digital Library Project is part of the Digital Libraries Initiative sponsored by the National Science Foundation and many others.  Additional funding at Berkeley currently comes from the CNRI-sponsored D-Lib Test Suite, and the NSF-sponsored National Partnership for Advanced Computational Infrastructure (NPACI) .  The work described in this paper was supported  in part as part of the NSF/NASA/ARPA  Digital Library Initiative under NSF IRI 94-11334.

 

2.  In particular, this project should not be confused with the California Digital Library (http://www.cdlib.org), an initiative of the University of California Office of the President.

 

3.  As of August, 2000.

 

4. This collection now has a quasi-separate identity as Calfora: http://www/calflora.org.  It consists of:

·         CalFlora Species Database: information about the 8375 currently recognized vascular plants in California, including scientific and common names, synonymy, distribution from literature sources, legal status, wetland codes, habitat info, and more; includes a photo of the plant, if available, from the CalPhotos California Plants & Habitats Collection.

·         California Plant Synonymy Table (Experimental): translates older scientific names to those currently recognized, and finds synonyms for names in current use.

·         CalPhotos California Plants & Habitats Photographs: 20,000 images of California plants and fungi  linked by taxonomic name to the CalFlora Names database.

·         CalFlora Occurrence Database: Over 660,000 records of plant observations from 15 state, federal, and private databases.

·         GIS Viewer: displays observation point data in conjunction with USGS topographical maps, geopolitical maps, relief maps, false-color satellite images, political borders, and aerial ortho-photographs.

 

5. Interviews were conducted by the author, Mark Butler, and Lisa Schiff.

 

6.  For purposes of discussion, I will call these the “water” and “botanical” groups.

 

7. E.g., a recent front-page newspaper article headlined “New Clash Surfaces in Water War,” began as follows: “In the same ‘water’s for fightin’ ‘ spirit that has defined power and politics in California, East Bay Municipal Utility district directors rejected a proposal Tuesday that might have ended a long, bitter water war between Sacramento and the Bay Area.”  (Oakland Tribune, June 23, 1999, p. 1)           

 

8. Others are interested in using the DL for publishing, as well.  A recent email, for example, offered the DL the sender’s unpublished paper which s/he described as “the most important and precious document in the world today.  I am sure that my paper bring a revolution in the field of water and soil management on the Earth which is the fundamental requirement of life on the planet.”

 

9. Authors like Biaggioli (1999) and Hess (1997) carefully sidestep the definition of science studies.  Even the choice of a phrase with which to refer to this broad and diverse area of research is problematic, with important distinctions made among science studies, science and technology studies (STS), sociology of scientific knowledge (SSKP), technoscience studies, and other variants.

 

10. ANT is most identified with the work of Latour, Callon, and Law  (Callon, 1986a, 1986b; Callon, Law, and Rip, 1986; Latour, 1987; Latour and Woolgar, 1991; Law, 1986, 1990, 1992; Law and Hassard, 1999).

11. ANT has been criticized for, among other things, being too agnostic about social formations such as power and gender, paying too much attention to design and development of sociotechnical systems and leaving out use and users, failing to consider why some networks are more enduring than others, and for its Machiavellian view of the world and often-warlike language ( Ormrod, 1995; Haraway, 1997).

 

12. The discussion that follows draws heavily on Kaghan and Bowker’s (1999) cogent presentation