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Abstract

While classifications are heavily used to categorize web content, the evolution of the web foresees a more formal structure - ontology - which can serve this purpose. Ontologies are core artifacts of the Semantic Web which enable machines to use inference rules to conduct automated reasoning on data. Lightweight ontologies bridge the gap between classifications and ontologies. A lightweight ontology (LO) is an ontology representing a backbone taxonomy where the concept of the child node is more specific than the concept of the parent node. Formal lightweight ontologies can be generated from their informal ones. The key applications of formal lightweight ontologies are document classification, semantic search, and data integration. However, these applications suffer from the following problems: the disambiguation accuracy of the state of the art NLP tools used in generating formal lightweight ontologies from their informal ones; the lack of background knowledge needed for the formal lightweight ontologies; and the limitation of ontology reuse. In this dissertation, we propose a novel solution to these problems in formal lightweight ontologies; namely, faceted lightweight ontology (FLO). FLO is a lightweight ontology in which terms, present in each node label, and their concepts, are available in the background knowledge (BK), which is organized as a set of facets. A facet can be defined as a distinctive property of the groups of concepts that can help in differentiating one group from another. Background knowledge can be defined as a subset of a knowledge base, such as WordNet, and often represents a specific domain.

Content

PhD Dissertation at International Doctorate School in Information and Communication Technology. Vgl.: https%3A%2F%2Fcore.ac.uk%2Fdownload%2Fpdf%2F150083013.pdf&usg=AOvVaw2n-qisNagpyT0lli_6QbAQ.

Imprint

Trento : University / Department of information engineering and computer science

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Content

Vgl.: http%3A%2F%2Fcreativechoice.org%2Fdoc%2FHansJonas.pdf&usg=AOvVaw1TM3teaYKgABL5H9yoIifA&opi=89978449.

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Abstract

With the current information environment characterized by the proliferation of digital resources, including collaboratively created and shared resources, Library of Congress Subject Headings (LCSH) is facing the challenges of effective and efficient subject-based organization and retrieval of digital resources. To explore the feasibility of utilizing LCSH in a digital environment, we might need to revisit its basic characteristics. The objectives of our study were to analyze LCSH in both syntactic and relational structures, to discover the structural characteristics of LCSH, and to identify problems and issues for the feasibility of LCSH as an effective subject access tool. This study reports and discusses issues raised by the syntactic and hierarchical structures of LCSH that present challenges to its use in a networked environment. Given the results of this study, we recommend a number of provisional future directions for the development of LCSH towards further becoming a viable system for digital and networked resources.

Source

Journal of the American Society for Information Science and Technology. 61(2010) no.4, S.677-687

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Abstract

This study is a citation analysis of a set of theses and dissertations in the Ohio State University's online catalog, for which the author-assigned keywords and cataloger-assigned Library of Congress Subject Headings (LCSH) are known. Correlations are sought between the types and ages of resources cited and the number of unique keywords and unique LCSH that were found. The author presents results found in three general discipline areas: arts and humanities, the social sciences, and science, technology, engineering, and medicine.

Date

10. 9.2000 17:38:22

Source

Library resources and technical services. 56(2012) no.4, S.238-253

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Abstract

This research concerns the frequency of the assignment of author-supplied keyword strings and cataloger supplied subject heading strings within a library catalog. The results reveal that, on average, more author-assigned keywords and more cataloger-assigned Library of Congress Subject Headings were assigned to works emerging from the arts & humanities than to works emerging from the social sciences and science, technology, engineering, and mathematics (STEM) disciplines. STEM disciplines in particular received a lower amount of topical metadata, in part because of the under-assignment of name/title, geographical, and corporate subject headings. These findings reveal how librarians could increase their understanding of how topical access is functioning within academic disciplines.

Date

17. 3.2019 18:04:22

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Abstract

Library of Congress Subject Headings (LCSH) geographic headings for the Southern Levant mirror the political investment of Congress and the American public in Middle East politics over the last thirty years. These LCSH headings contrast markedly with those established in other national libraries and independent value vocabularies, and global opinion regarding the legal status of the occupied territories. The author offers ways that libraries can "decolonize" their metadata in service of Sanford Berman's "access and equity."

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Source

http://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&ved=0CDQQFjAE&url=http%3A%2F%2Fdigbib.ubka.uni-karlsruhe.de%2Fvolltexte%2Fdocuments%2F3131107&ei=HzFWVYvGMsiNsgGTyoFI&usg=AFQjCNE2FHUeR9oQTQlNC4TPedv4Mo3DaQ&sig2=Rlzpr7a3BLZZkqZCXXN_IA&bvm=bv.93564037,d.bGg&cad=rja

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Abstract

Music catalogers have embraced in current cataloging the flexibility, intuitiveness, and expressivity afforded by the Library of Congress's new faceted vocabularies. In order to realize the full benefits to discovery these vocabularies offer, however, methods for programmatically assigning faceted terms retrospectively to existing metadata for music resources are required in order to mitigate the costs of manual enhancement of legacy data. This article describes efforts to repurpose existing Library of Congress Subject Headings as faceted data, taking advantage of recent developments in the MARC 21 formats. Limitations inherent to this process and ideas for future directions are described.

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Abstract

On a scientific concept hierarchy, a parent concept may have a few attributes, each of which has multiple values being a group of child concepts. We call these attributes facets: classification has a few facets such as application (e.g., face recognition), model (e.g., svm, knn), and metric (e.g., precision). In this work, we aim at building faceted concept hierarchies from scientific literature. Hierarchy construction methods heavily rely on hypernym detection, however, the faceted relations are parent-to-child links but the hypernym relation is a multi-hop, i.e., ancestor-to-descendent link with a specific facet "type-of". We use information extraction techniques to find synonyms, sibling concepts, and ancestor-descendent relations from a data science corpus. And we propose a hierarchy growth algorithm to infer the parent-child links from the three types of relationships. It resolves conflicts by maintaining the acyclic structure of a hierarchy.

Content

Vgl.: https%3A%2F%2Faclanthology.org%2FD19-5317.pdf&usg=AOvVaw0ZZFyq5wWTtNTvNkrvjlGA.

Source

Graph-Based Methods for Natural Language Processing - proceedings of the Thirteenth Workshop (TextGraphs-13): November 4, 2019, Hong Kong : EMNLP-IJCNLP 2019. Ed.: Dmitry Ustalov

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Abstract

This invaluable cataloging resource gives pre-service and practicing school library media specialists the tools they need to be intelligent consumers of commercial cataloging and competent organizers of new materials in their collections. The second edition contains expanded information on Library of Congress Subject Headings and electronic cataloging and cataloging systems, as well as Dewey Decimal Classification (DDC) and Machine Readable Cataloging (MARC). Whether you're a practicing cataloger looking for a short text to update you on the application of RDA to cataloging records or a school librarian who needs a quick resource to answer cataloging questions, this guide is for you. - Thoroughly updates a best-selling, essential guide to cataloging - Addresses the new standards specifically as they apply to school libraries - Helps school librarians understand and implement the new cataloging standards in their collections - Distills the latest information and presents it in a format that is clear and accessible - Fills the need for up-to-the-minute cataloging guidance for the busy librarian who wants information in a hurry

LCSH

Cataloging / Handbooks, manuals, etc

Subject

Cataloging / Handbooks, manuals, etc

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Abstract

The Association for Manitoba Archives has created a database where members can deposit archival descriptions to provide a central search for users. Library of Congress Subject Headings (LCSH) were chosen as the controlled subject vocabulary to use in the descriptions, but changes were made to LCSH to better describe material about or by Indigenous peoples. Examples include: the word "Indian"; geographic place embedded in terms such as "Indians of North America"; changes related to Manitoba peoples specifically; and miscellaneous changes not part of a larger pattern. New terms were also added.

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Abstract

The knowledge organization system prepared by the Library of Congress (LC) and widely used in academic libraries has some disadvantages for researchers in the fields of African American studies and LGBTQIA studies. The interdisciplinary nature of those fields means that browsing in stacks or shelflists organized by LC Classification requires looking in numerous locations. As well, persistent bias in the language used for subject headings, as well as the hierarchy of classification for books in these fields, continues to "other" the peoples and topics that populate these titles. This paper offers tools to help researchers have a holistic view of applicable titles across library shelves and hopes to become part of a larger conversation regarding social responsibility and diversity in the library community.

Content

Beitrag in einem Themenheft: 'Race and Ethnicity in Library and Information Science: An Update'.

Source

Library trends. 67(2018) no.1, S.74-88

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Abstract

This article argues that the use of the Library of Congress subject heading "East Indians" in reference to individuals from India represents not only a problematic vestige of colonialism, but also a failure of the principle of literary warrant. It provides an overview of the term's historical roots and then examines whether the term is still widely used in published resources. Although assigning a subject heading is not easy and can involve a choice between contested realities of diverse peoples, the author contends that a rejection of outdated terminology is central to providing any culturally sensitive tool for resource organization.

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Abstract

Cataloging and classification provide intellectual access for organizing resources in libraries. In New Zealand, bibliographic control is largely through the application of Library of Congress Subject Headings (LCSH). LCSH provide a sense of context and order. In Indigenous frameworks this sense of order can be found in the link between epistemology and knowledge structure. This article argues that the development and application of Maori subject headings is directly related to the natural order that is pivotal to a Maori worldview. The impact of this worldview and its associated values are explored in the context of the construction of Nga Upoko Tukutuku.

Object

Maori subject headings

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Abstract

The National Library of Latvia (NLL) made a decision to use the Library of Congress Subject Headings (LCSH) in 2000. At present the NLL Subject Headings Database in Latvian holds approximately 34,000 subject headings and is used for subject cataloging of textual resources, including articles from serials. For digital objects NLL uses a system like Faceted Application of Subject Terminology (FAST). We succesfully use it in the project "In Search of Lost Latvia," one of the milestones in the development of the subject cataloging of digital resources in Latvia.

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Abstract

The concept of Linked Data has made its entrance in the cultural heritage sector due to its potential use for the integration of heterogeneous collections and deriving additional value out of existing metadata. However, practitioners and researchers alike need a better understanding of what outcome they can reasonably expect of the reconciliation process between their local metadata and established controlled vocabularies which are already a part of the Linked Data cloud. This paper offers an in-depth analysis of how a locally developed vocabulary can be successfully reconciled with the Library of Congress Subject Headings (LCSH) and the Arts and Architecture Thesaurus (AAT) through the help of a general-purpose tool for interactive data transformation (OpenRefine). Issues negatively affecting the reconciliation process are identified and solutions are proposed in order to derive maximum value from existing metadata and controlled vocabularies in an automated manner.

Date

22. 3.2013 19:29:20

Source

Journal of the American Society for Information Science and Technology. 64(2013) no.3, S.464-479

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Abstract

Standard library classification systems like Dewey Decimal Classification (DDC), U.S. Library of Congress Classification (LCC), and Universal Decimal Classification (UDC) are internationally known and widely used by libraries as the tools for organizing information. Charles Ammi Cutter's Expansive Classification (EC), James Duff Brown's Subject Classification (SC), Henry E. Bliss' Bibliographic Classification (BC), and S. R. Ranganathan's Colon Classification (CC) also are standard classification systems, but they are less commonly used compared to aforementioned three systems. All these systems are easy to use and convenient for most general collection libraries. However, these systems are not adequate for some special collections. Libraries with rich collections on Islam also face problems while using these systems, although such libraries often use expansions in the original systems for their collections. This paper examines this problem and presents a potential optimal solution. The author collected data, using a semistructured interview technique, from a representative sample of thirty libraries in eight countries with strong collections in Islam. These data were analyzed employing qualitative methods.

Date

10. 9.2000 17:38:22

Source

Library resources and technical services. 56(2012) no.3, S.171-182

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Abstract

The successes of information retrieval (IR) in recent decades were built upon bag-of-words representations. Effective as it is, bag-of-words is only a shallow text understanding; there is a limited amount of information for document ranking in the word space. This dissertation goes beyond words and builds knowledge based text representations, which embed the external and carefully curated information from knowledge bases, and provide richer and structured evidence for more advanced information retrieval systems. This thesis research first builds query representations with entities associated with the query. Entities' descriptions are used by query expansion techniques that enrich the query with explanation terms. Then we present a general framework that represents a query with entities that appear in the query, are retrieved by the query, or frequently show up in the top retrieved documents. A latent space model is developed to jointly learn the connections from query to entities and the ranking of documents, modeling the external evidence from knowledge bases and internal ranking features cooperatively. To further improve the quality of relevant entities, a defining factor of our query representations, we introduce learning to rank to entity search and retrieve better entities from knowledge bases. In the document representation part, this thesis research also moves one step forward with a bag-of-entities model, in which documents are represented by their automatic entity annotations, and the ranking is performed in the entity space.
This proposal includes plans to improve the quality of relevant entities with a co-learning framework that learns from both entity labels and document labels. We also plan to develop a hybrid ranking system that combines word based and entity based representations together with their uncertainties considered. At last, we plan to enrich the text representations with connections between entities. We propose several ways to infer entity graph representations for texts, and to rank documents using their structure representations. This dissertation overcomes the limitation of word based representations with external and carefully curated information from knowledge bases. We believe this thesis research is a solid start towards the new generation of intelligent, semantic, and structured information retrieval.

Content

Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Language and Information Technologies. Vgl.: https%3A%2F%2Fwww.cs.cmu.edu%2F~cx%2Fpapers%2Fknowledge_based_text_representation.pdf&usg=AOvVaw0SaTSvhWLTh__Uz_HtOtl3.

Imprint

Pittsburgh, PA : Carnegie Mellon University, School of Computer Science, Language Technologies Institute

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Abstract

Why do catalogers use two systems, one notational like Library of Congress Classification (LCC) and the other terminological like Library of Congress Subject Headings (LCSH), to reach the same goal: subject description and access? This article, divided into two parts, first surveys the library science literature to address the unsatisfying answers given to that question and, secondly, provides a new answer based on the linguistic theory of Roman Jakobson. Jakobson's theory that language is always twofold, the act of selecting words paired with the act of combining words, is proposed as a theory of subject access, with LCSH doing the work of selection and LCC thework of combination.

Footnote

Vgl. die Erwiderung: Bade, D.: Jakobsonian library science? A response to Jonathan Tuttle's article "The aphasia of modern subject access". In: Cataloging and classification quarterly. 51(2013) no.4, S.428-438 sowie darauf die Erwiderung: Tuttle, J.: Jakobsonian library science? a response to David Bade. In: Cataloging and classification quarterly. 51(2013) no.4, S.439-440.

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Abstract

Purpose - This paper attempts to explain the wide dissemination of Library of Congress Subject Headings (LCSH) within digital libraries and presents some of the advantages and disadvantages of using this controlled vocabulary in digital collections. The paper also presents other classifications used in digital collections for subject access and explores ways of improving search functionality in digital collections that employ LCSH. Design/methodology/approach - Unlike traditional libraries that use Library of Congress Classification for organization and retrieval, digital libraries use metadata forms for organization and retrieval. The collections exist in cyberspace of the internet which is known for containing the universe of knowledge. The use of LCSH for information retrieval has been widely criticized for its difficulty of use and its information retrieval effectiveness in online environments. The Library of Congress (LOC) has claimed the headings were not based on comprehensive principles nor ever intended to cover the universe of knowledge. Despite these claims and criticisms, LCSH is the most popular choice for subject access in digital libraries. Findings - The number of digital collections increases every year and LCSH is still the most popular choice of controlled vocabulary for subject access. Of the numerous criticisms, difficulties of use and user unfamiliarity are the greatest disadvantages of using LCSH for subject access. Average users only have a vague notion of what they are looking for when initializing a search. More work is required in automated generation of subject headings and increased usage of LCSH in faceted search retrieval systems. This will provide users with better access to the LCSH used in the back end of information retrieval. Originality/value - The Greek researchers who developed the Dissertation DSPace system believe this type of module will eventually replace the traditional keyword-based indexing back ends employed by many information retrieval modules within current digital library systems. The system offers the type of access and interactivity that will acquaint users with how LCSH looks and is used. Faceted search and automated pattern matching using an ontology based on LCSH have the best promise of overcoming the disadvantages that have always plagued the LOC-controlled vocabulary. These retrieval techniques give LCSH an opportunity to finally achieve the optimal precision and recall it has so far failed to deliver.

Source

Library review. 60(2011) no.4, S.328-343