Japanese Metadata Standards National Diet Library Dublin Core Metadata Description (DC-NDL) : Describing Japanese Metadata and Connecting Pieces of Data Saho Yasumatsu National Diet Library, Japan Akiko Hashizume National Diet Library, Japan Julie Fukuyama National Diet Library, Japan
Overview 1. About the National Diet Library 2. What is the DC-NDL? 3. Features of the DC-NDL 4. Using the DC-NDL: NDL Search 5. Future plans for the DC-NDL 2
1. About the National Diet Library 3
The National Diet Library (NDL) Tokyo Main Library Kansai-kan International Library of Children's Literature 4
The National Diet Library (NDL) National Library Diet (Parliament) Library 5
NDL Preserve collections Make metadata Legal Deposit System Provide Japanese publications (Books, Journals, etc.) Users 6
Collections are searchable through NDL-OPAC and NDL Search on website 7
NDL aims to promote the use of Linked Data and provides metadata as Linked Data http://www.ndl.go.jp/en/aboutus/standards/lod.html 8
The main topic of this presentation The National Diet Library Dublin Core Metadata Description (DC-NDL) 9
2. What is the DC-NDL? 10
The DC-NDL is A descriptive metadata standard Utilized primarily for converting catalog records of publications held by the NDL into metadata Based on the Dublin Core Metadata Element Set and the DCMI Metadata Terms 11
The DC-NDL 1. NDL Metadata Terms 2. Application Profile FOCUS 3. RDF Schema 12
Basic structure of the DC-NDL Administrative Information Bibliographic Information FOCUS Item Information 13
A Brief History Revised three times since launch March 2001 May 2007 June 2010 December 2011 current Reflecting : revisions to the Dublin Core : expansion of NDL services 14
3. Features of the DC-NDL 15
The key functions of the DC-NDL: 1. Representing the yomi (reading) of the Japanese language : for accommodating certain unique features of the Japanese language 2. Connectivity with Linked Data : for maintaining the broad perspective of linking to the world's data 3. Compatibility with digitized materials : for accommodating NDL activities 16
3.1. Representing reading of Japanese language 17
Japanese language has three distinct types of characters : hiragana : katakana : kanji All of these words are read as "i-chi-go (strawberry) 18
Some words have several different readings su-i-ka (watermelon) ni-shi-u-ri Watermelon in Japanese could be read as either "su-i-ka" or "ni-shi-u-ri" 19
Reading varies depending upon meaning ga-ku hi-ta-i The word could be read as either ga-ku or hi-ta-i 20
: ga-ku (frame) : hi-ta-i (forehead) 21
Without spaces inserted between words, it is difficult to understand meaning 22
(Case 1) "Koko-de-wa-kimono (means clothes )-wo-nuide-kudasai" (Case 2) "Koko-de-hakimono (means shoes )-wo-nuide-kudasai" 23
DC-NDL defines metadata terms to represent characteristics of the Japanese language E.g. Title field 24
(1)DC-NDL defines original properties such as Transcription Extract data from Bibliographic Information 25
(2)Value stored in Transcription property is sentence with blanks between words Extract data from Bibliographic Information 26
(3)Title representation and reading described as a set, using dc:title in its range Extract data from Bibliographic Information 27
3.2. Connectivity with Linked Data 28
DC-NDL uses URI values to link with other data E.g. creator and subject 29
Example of link to "dcterms:creator" Bibliographic data VIAF 30
A Web NDL Authorities link to VIAF VIAF 31
Example of using URIs in "dcterms:subject" URI of the Nippon Decimal Classification (NDC) 9th edition <dcterms:subject rdf:resource= "http://id.ndl.go.jp/class/ndc9/210.02"/> URI of the National Diet Library Classification (NDLC) <dcterms:subject rdf:resource= "http://id.ndl.go.jp/class/ndlc/gb38"/> 32
Example of link to "dcterms:subject" Bibliographic data LCSH 33
A Web NDL Authorities link to LCSH LCSH 34
3.3. Compatibility with digitized materials 35
DC-NDL defines metadata terms to describe digitized contents 36
Example of terms for digitized content Description of the publisher of the digitized version <dcndl:digitizedpublisher>national Diet Library </dcndl:digitizedpublisher> Date when the content was digitized <dcndl:datedigitized>2013</dcndl:datedigitized> 37
4. Using DC-NDL: NDL Search 38
What is NDL Search? http://iss.ndl.go.jp/ 39
A gateway to rich repository of information NDL, public libraries, academic libraries, archives, museums, and academic research institutions in Japan 40
69 About institutions 85millon Metadata 41 Metadata 41
provides DC-NDL metadata records in RDF via API RDF data API *You can use our metadata freely, if your use is non-commercial. 42
5. Future plans for the DC-NDL 43
For connecting more data: We need more connections to other links We must examine which elements are appropriate for linking with other data and which URIs are suitable to include in our data We need to identify data that can be linked with ours 44
Thank you for your attention! Feel free to ask any questions. Saho Yasumatsu 45