Supporting FRBRization of Web Product Descriptions

Transcription

1 Supporting FRBRization of Web Product Descriptions Naimdjon Takhirov, Fabien Duchateau, Trond Aalberg Department of Computer and Information Science Norwegian University of Science and Technology Theory and Practice of Digital Libraries (TPDL' 2011) Berlin, Germany Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 1

2 Outline Introduction 1 Introduction Motivation Overview of FRBR 2 3 Experiment Protocol Results Issues 4 Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 2

3 Motivation Motivation Overview of FRBR The Web is a major source of information for many users Larger amount of information than in library catalogs Web product descriptions can be interpreted at manifestation level (as a MARC record describing a publication) Enabling discovery of unknown, potentially interesting items Supporting more knowledge-like representation Various sources can be checked for verication Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 3

4 Overview of FRBR Motivation Overview of FRBR The goal is to establish a precise and shared understanding of what the bibliographic record should provide information about An entity-relationship model FRBR is a conceptual model Not a specic metadata schema or data model On the other hand, the conceptual model we use should be the foundation for the the logical data model A lot of experiments on using FRBR so far, but no clear agenda for realizing the model in library systems Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 4

5 Overview of FRBR (2) Motivation Overview of FRBR is realized through is realization of FRBR group 1 entities Work Expression is embodied in is embodiement of is created by Manifestation is exemplified by is exemplar of is realized by Item has created is produced by has realized Person has produced Corporate Body is owned by owns FRBR group 2 entities Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 5

6 Overview of FRBR (3) Motivation Overview of FRBR Person Tolkien J.R.R has created Work The Fellowship of the Ring has created Work The Two Towers Work The Return of the King has part Work The Lord of the Rings is realized in Expression To tårn (norw. translation) is embodied in Expression The Two Towers (Eng.) is embodied in Manifestation Ringenes Herre - To tårn (2003) Manifestation The Two Towers Paperback edition, September 2003 Manifestation The Two Towers Paperback edition, June 2005 Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 6

7 Workow Introduction Web Products Set of input product descriptions Dierent properties as compared with bibliographic records Identify Work Works actors manifestations and expressions Manifestations and Expressions Interpret at manifestation level Persons / Corp.body FRBR Relationships FRBRized collection Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 7

8 Workow Identify work Introduction Web Products Local generation method Identify Work manifestations and expressions Using an external service (e.g., OCLC Classify) Retrieve records and apply existing FRBRization techniques Works actors Persons / Corp.body Manifestations and Expressions FRBR Relationships FRBRized collection Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 8

9 Workow Identify work Introduction Web Products Local generation method Identify Work manifestations and expressions Using an external service (e.g., OCLC Classify) Retrieve records and apply existing FRBRization techniques Works actors Persons / Corp.body Manifestations and Expressions FRBR Relationships FRBRized collection Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 8

10 Workow manifestations and expressions Web Products Obtain all manifestations (e.g. xisbn, ThingISBN) Identify Work manifestations and expressions Use one of the expression level attributes for clustering/identication (e.g., language) Works actors Manifestations and Expressions local identiers Persons / Corp.body Store references to manifestations FRBR Relationships FRBRized collection Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 9

11 Workow manifestations and expressions Web Products Obtain all manifestations (e.g. xisbn, ThingISBN) Identify Work manifestations and expressions Use one of the expression level attributes for clustering/identication (e.g., language) Works actors Manifestations and Expressions local identiers Persons / Corp.body Store references to manifestations FRBR Relationships FRBRized collection Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 9

12 Workow actors Actor: responsible for the work, such as author, director Use VIAF for search and perform string matching on the results Choose the top-1 from the list of top 30 hits (ranking is based on an average of Monge Elkan, Jaro Winkler and Levenshtein similarity values) Identify Work Works Web Products actors Persons / Corp.body FRBR Relationships FRBRized collection manifestations and expressions Manifestations and Expressions Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 10

13 Workow actors Actor: responsible for the work, such as author, director Use VIAF for search and perform string matching on the results Choose the top-1 from the list of top 30 hits (ranking is based on an average of Monge Elkan, Jaro Winkler and Levenshtein similarity values) Identify Work Works Web Products actors Persons / Corp.body FRBR Relationships FRBRized collection manifestations and expressions Manifestations and Expressions Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 10

14 Workow FRBR relationships Web Products Use locally generated identiers Identify Work manifestations and expressions Link relationships between FRBR entities output le (HTML, RDF/XML, XML, SQL insert statements etc) Works actors Persons / Corp.body FRBR Relationships Manifestations and Expressions FRBRized collection Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 11

15 Workow FRBR relationships Web Products Use locally generated identiers Identify Work manifestations and expressions Link relationships between FRBR entities output le (HTML, RDF/XML, XML, SQL insert statements etc) Works actors Persons / Corp.body FRBR Relationships Manifestations and Expressions FRBRized collection Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 11

16 Experimental Protocol Experiment Protocol Results Issues 80 best selling ction authors (extracted from Wikipedia) Amazon Product Advertising API for collecting dataset (ItemSearch operation on Book, Video, Music indexes) Attributes: title, author (director for movies), various contributors, ISBN, language, and release date Services: OCLC Classify, xisbn, VIAF Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 12

17 Results Introduction Experiment Protocol Results Issues FRBR # Input # Discov. # FRBRized Entity Type Resources Entities Entities Work Expression 5074 Manifestation Book Video DVD Music Actor Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 13

18 FRBRPedia Experiment Protocol Results Issues Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 14

19 Issues Introduction Experiment Protocol Results Issues Search results from Amazon often needed to be cleaned (e.g., The Lord of the Rings: The Return of the King (Widescreen Edition)) Missing work information (e.g., the Classify API database did not include requested item) Several authors in VIAF (duplication problem) Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 15

20 FRBR is not limited to library catalogs Applied FRBR model beyond its typical realm A methodology with dierent services to FRBRize product descriptions Enables easier discovery of potentially interesting items Our experiment show good results What about more complex cases (e.g. aggregate works)? Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 16

21 Questions or Comments? Supporting Naimdjon Takhirov Naimdjon Takhirov Supporting FRBRization of Web Prod. Descriptions 17