European Conference on Hypertext最新文献

{"title":"Hyperdocuments as automata: trace-based browsing property verification","authors":"P. D. Stotts, R. Furuta, J. Ruiz","doi":"10.1145/168466.171515","DOIUrl":"https://doi.org/10.1145/168466.171515","url":null,"abstract":"In many hypertext systems, meaningfully traversing a document depends on capabilities, features, and navigational aids that are part of the browser implementation. For example, if a reader browses to a node that has no out links, then backing up, or \"warping\" to the table of contents can allow the browsing session to continue. If hyperdocuments are to become interchangeable among hypertext systems, rather than being readable only on the systems from which they are authored, one obvious but complex approach is to try and standardize on (most likely, very many) browsing features and behaviors, forming some standard union of the capabilities of current major implementations. This approach molds (or perhaps restricts) future systems, since new browsing \"features\" must then be worked into such a standard. An alternate approach, used in this paper, is to de-emphasized browser features and emphasize inherent document structure with browsing semantics. An author should be able to create document structure so that the desired meaningful access patterns are inherently allowed by links rather than by browser capabilities. We present a method of analyzing the browsing properties of a hypertext document by examining the links alone. This method is not specific to any particular This work is based upon work supported by the National Science Foundation under grant numbers IRI-9007746 and IRI-9015439. Pennission to copy without fee all or part of this material is granted provided that copies are not made or distributed for direct conunercia.l advantage, the ACM copyright notice and the title of the publication and its date appear, and notice is given that copying is by permission of the Association for Computing Machinery. To copy otherwise, or to republish, requires a fee and/ or specific permission. ©1992 ACM 0-89791-547-X/92/0011/0272/ $1.50 hypertext system or document authoring. format. With it, an author can be certain that a document will allow particular access patterns when read on any browser implementation that has a single navigation operation: direct link following. The method requires a mental shift in how a hyperdocument is conceived abstractly. Instead of treating the links of a document as defining a static directed graph, they are thought of as defining an abstract program, termed the links-automaton of the document. A branching temporal logic notation, termed HTL *, is introduced for specifying properties a document should exhibit during browsing. An automated program verification technique called model checking is then used to verify that these specifications are met by the behavior of the links-automaton. We illustrate the generality of our technique by applying it first to a Trellis document, and then to a Hyperties document.","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116557440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Video nodes and video webs: use of video in hypermedia","authors":"S. Gibbs","doi":"10.1145/168466.168475","DOIUrl":"https://doi.org/10.1145/168466.168475","url":null,"abstract":"Extended Abstract Digital video consists of temporally correlated audio and visual data elements. Audio elements are basically sequences of digitized audio samples , while visual elements are sequences of raster frames. In either case the sequences may not be stored explicitly, but instead stored in a compressed representation, or an alternate representation from which the sequences are produced (as when audio is synthesized from a symbolic representation , such as musical notation, or video frames are rendered from animation data). Because of the temporal nature of digital video, its production and consumption often requires specialized devices capable of the real-time handling of streams of data. Until recently this equipment was expensive and not readily available. However a number of significant advances are now taking place that are greatly increasing the use of digital video. These developments include advances in high-bandwidth networks and protocols facilitating real-time transfer of digital video; improvements in storage media such as high-capacity magnetic disks and writable CDs; faster rendering rates for graphics hardware allowing real-time animation; greater availability of special-purpose audio and video processors on workstations; and better computer interfaces to both commercial and professional video products such as camcorders, VCRs, and video mixers. Another significant development is real-time compression and decom-pression hardware for digital video. The compressed video has data rates comparable to bus and disk bandwidths and so opens the possibility of video recording and playback from conventional secondary storage devices. \" In ad'dition, an anticipated future development having broad-impact on the use of video, will be the emergence of standards for HDTV. In light of these changes, new possibilities are arising for application developers-in particular those who aim to enhance hypertext, or hy-permedia, with video capabilities. Early interactive video systems relied on analog read-only videodisc technology. This \" first generation)' of video-based hypermedia provided very good video quality, but suffered from limitations imposed by the videodisc. Now digital video offers a way around many of the drawbacks of the \" videodisc-digital video can be edited and modified, it can be processed, and, like any other form of data, it can be stored and retrieved from conventional storage systems. This presentation will focus on implications of digital video for hypermedia. A short overview of video technology will be provided, introducing such topics as video formats, video compre~ sion, and video editing. Several low-cost platforms for running digital video applications will be described and illustrated …","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129518824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design strategies for scenario-based hypermedia: description of its structure, dynamics, and style","authors":"Ryuichi Ogawa, Eiichiro Tanaka, Daigo Taguchi, Komei Harada","doi":"10.1145/168466.168494","DOIUrl":"https://doi.org/10.1145/168466.168494","url":null,"abstract":"This paper describes design strategies for scenariobased hypermedia, which presents media composite nodes according to timed scripts. In order to translate an author’s story into timed scripts within a hypermedia framework, we present a design model with four different levels of scenario specifications. In these levels an author specifies details of 1) global structure described as the hierarchy of composite nodes with sequencing relationship between them, 2) detailed structure of a composite node described as a set of subnodes and navigation flow between them, 3) content specification of multimedia data, and 4) time and spatial presentation style of media data included in each node. Design strategies based on the model were applied to the authoring of a CD-ROM based English listening course for Japanese students. The design work was accomplished as a joint project with English teachers, and our scenario-based hypermedia system, Videobook, was used as the authoriug platform. This paper reports the details of the design strategies in each level and discusses how they made the authoring efficient while promoting the quality of the course.","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132202881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cognitive processing of hyperdocuments: when does nonlinearity help?","authors":"J. Rouet","doi":"10.1145/168466.168508","DOIUrl":"https://doi.org/10.1145/168466.168508","url":null,"abstract":"This paper presents a review of empirical research on the cognitive processing of nonlinear documents, with the purpose of understanding when and how hypertext presentation might facilitate text comprehension and learning activities. Empirical studies conducted so far have used various methods, and foeused on a wide range of populations, types of documents, and reading or learning tasks. Alkhough hypertext is generally associated with information networks, a few interesting studies ad&ess the issues of computer assistance to linear text comprehension. A second group of studies investigate the use of nonlinear documents for general learning purposes. Although these studies are mainly concerned with linear-nonlinear comparisons, some of them address the effects of different design options. Finally,, a third group of studies compare information retrieval in linear versus nonlinear documents. Overall, there is no consistent evidence for the advantage of hypertext over linear presentation formats. Instead, the efficiency of nonlinear documents varies aeeording to (a) subjects’ expertise (b) interface features and (c) task requirements. In an attempt to provide an interpretative framework for these empirical findings, the notion of cognitive monitoring is briefly outlined. I conclude with a few implications for future hypertext reseamh. Permission to copy without fee all or part of this materisl is granted provided that copies are not made or distributed for direct commercial advantage, the ACM copyright notice and the title of the publication and its date appear, and notice is given that copying is by permission of the Association for Computing Machinery. To copy otherwise, or to republish, requires a fee and/or specific permission. @1992 ACM O-89791-547-X/92/0011 /0131/ $1.50","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117234917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gram: a graph data model and query languages","authors":"B. Amann, M. Scholl","doi":"10.1145/168466.168527","DOIUrl":"https://doi.org/10.1145/168466.168527","url":null,"abstract":"We present a model for data organized as graphs. Regular expressions over the types of the node and edge labels\u0000are used to qualify connected subgraphs. An algebraic language based on these regular expressions and supporting\u0000a restricted form of recursion is introduced. A natural application of this model and its query language is hypertext\u0000querying.","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128435039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural and cognitive problems in providing version control for hypertext","authors":"K. Østerbye","doi":"10.1145/168466.168484","DOIUrl":"https://doi.org/10.1145/168466.168484","url":null,"abstract":"This paper discusses issues related to providing version control in hypertext systems. Many of the software engineering issues in versioning also apply to hypertext, but the emphasis on linking and structure in hypertext raises some new problems. The issues can roughly be divided into two categories. Datamodel issues, which will be referred to as structural issues, and user interface issues, which will be referred to aa cognitive issues. Both structural and cognitive issues will be described and divided into simpler problems which will be named and described, and it will be shown that composites serve aa a good starting point for solving both structural and cognitive problems of versioning.","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129142530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Combining hypertext and structured documents in Grif","authors":"V. Quint, I. Vatton","doi":"10.1145/168466.168482","DOIUrl":"https://doi.org/10.1145/168466.168482","url":null,"abstract":"This paper presents the experience gained in developing and using the hypertext functions of the Grif systeml. Grif is a structured document editor based on the generic structure concept: each document is represented in the system by it~ logical structure which is an instance of a generic structure. This notion of logical structure encompasses both hierarchical structures (as is usual in structured documents) and non-hierarchical links (as is usual in hypertext). The document model on which Grif is based is presented, focusing on the different types of links. Various applications using these links are also described. It is shown that the approaches of elect ronic documents and hypertext, which are often opposed to each other, can be combined for building more powerful integrated systems.","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114726650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Imagined conversations: the relevance of hypertext, pragmatism, and cognitive flexibility theory to the interpretation of “classic texts” in intellectual history","authors":"R. Jones, R. Spiro","doi":"10.1145/168466.168512","DOIUrl":"https://doi.org/10.1145/168466.168512","url":null,"abstract":"What does it mean to understand a “classic text” in the history of social thought? Recent pragmatist arguments in intellectual history suggest that it is a matter of placing the text within some larger context, viewing it from a variety of perspectives, and “using it” to satisfy one’s own interests and purposes. What is the best means to “advanced knowledge acquisition”? Reeent theories of learning in cognitive psychology suggest that we view “ill-structured knowledge domains” as landscapes, to be “criss-crossed” in a variety of directions, from multiple perspectives. Hypertext is a technology for doing both of these things. Quite independently, but sharing a foundation in pragmatism and the later Wittgenstein, each of these disciplines thus encourages further mearch in the development and implementation of hypertext systems for learning. Such research is being carried out in the Hypermedia Laboratory and the Cognitive Flexibility Laboratory at the University of Illinois, with implications for the way hypertext systems are designed and implemented, and the p&lagogical problems to which they are applied. Permission to copy without fee all or part of this material is granted provided that copies are not made or distributed for direct comercial advantage, the ACM copyright notice and the title of the publication and its date appear, and notice is given that copying is by permission of the Association for Computing Machinery. To copy otherwise, or to republish, requks a fee and/cw specific permission. @1992 ACM O-89791-547-X/92/0011 /0141/ $1.50","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115844232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design issues for a Dexter-based hypermedia system","authors":"Kaj Grønbæk, R. Trigg","doi":"10.1145/168466.168525","DOIUrl":"https://doi.org/10.1145/168466.168525","url":null,"abstract":"This paper discusses experiences and lessons learned from the design of an open hypermedia system, one that integrates applications and data not ''owned'' by the hypermedia. The Dexter Hypertext Reference Model was used as the basis for the design. Though our experiences were generally positive, we found the model constraining in certain ways and underdeveloped in others. For instance, Dexter argues against dangling links, but we found several situations where permitting and supporting dangling links was advisable. In Dexter, the data objects making up a component's contents are encapsulated in the component; in practice, references to objects stored apart from the hyper media structure should be allowed. We elaborate Dexter's notion of composite component to include composites that ''contain'' other components and composites with structured contents, among others. The paper also includes a critique of Dexter's notion of link directionality, proposes a distinction between marked and unmarked anchors, and discusses anchoring within a composite.","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129584418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Virtual reality and the future of hypertext (abstract)","authors":"J. Bolter","doi":"10.1145/168466.168473","DOIUrl":"https://doi.org/10.1145/168466.168473","url":null,"abstract":"Extended Abstract Virtual Reality has been largely conceived in terms this direction: the concept maps in hypertext sys-of the visual. Other senses, sound and touch, al-tema are examples of symbolic spaces in two di-though given roles, are clearly quite secondary. mensions. A third dimension would expand the What VR presents to the user is images, not texts. possibilities of representation. Such a hypertex-What role might text play in Virtual Reality? This tualized virtual space might allow the creation of is particularly important for exponents of hyper-text unlike any that have ever been written. text, because VR threatens to become the hot new topic, and perhaps to diminish interest and research in hypertext. One could convincingly argue there is no real direct competition: VR and hypertext can evolve side by side for different purposes. VR is useful for simulation and training, for medical imaging, for telepresence, and so on. Hypertext serves for databases of text materials, pedagogy, and interactive fiction and nonfiction. But even if VR and hypertext continue to evolve side by side, it remains interesting to consider how the two might merge. Virtual Reality and hypertext are products of two different communication technologies. Virtual Reality has its closest affinity to television, which is a perceptual medium. Hypertext comes out of the tradition of writing. Both VR and hypertext claim to be new ways of expressing information, although with different emphases. In VR, one sees and touches a perceptual space; in hypertext one reads and writes in a textual space. Can the two be combined? In particular , can the space of virtual reality be hypertex-tualized? One way to introduce text into virtual reality would be to write upon the surfaces in the virtual space. This would give us a virtual book, whose structure is expressed architecturally in three dimensions. The book becomes a space that the reader enters and explores, a space in which the relationships among the surfaces define relationships among the verbal ideas in the text. A more radical possibility y would be to turn the entire virtual space into a symbolic structure. Several hypertext systems are already moving in","PeriodicalId":112968,"journal":{"name":"European Conference on Hypertext","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127526872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}