Carol Jean Godby Research Scientist Mapping Bibliographic Metadata ALA OCLC Update June 28, 2010

The problem My records are in this format…...but they need to be in this other format.

What is a crosswalk? “ C rosswalks are used to ‘ translate ’ between different metadata element sets. The elements (or fields) in one metadata set are correlated with the elements of another metadata set that have the same or similar meanings. This is also sometimes called ‘ semantic mapping. ’” Source: Canadian Heritage Information Network (

ONIX is the international standard for the book industry

ONIX and MARC records BB 01 McBain’s Ladies A01 Hunter, Evan 02 Policewomen--Fiction. Leader jm a g eng 020 $a $a Hunter, Evan 245 $a McBain’s ladies 260 $b Mysterious Press $d $a 320 p. 650 #2 $a Policewomen -- Fiction Leader jm a g eng 020 $a $a Hunter, Evan 245 $a McBain’s ladies 260 $b Mysterious Press $d $a 320 p. 650 #2 $a Policewomen -- Fiction

Some maps between ONIX and MARC ONIX pathONIX code ProductIdentifier / ProductIDType IDValue=2 Title / TitleText = 01 TitleType=1 Subject / SubjectHeadingText SubjectSchemeIdentifier=02 MARC element MARC i1,i2 020 $a 245 $a 650 $a2

Some maps between Dublin Core and MARC DC SimpleDC TermsMARC tag MARC subfields dc: subject dcterms: subject 650a dcterms: Audience 521a dc: coverage dcterms: Spatial 522a

CONTENTdm

You can adjust where source metadata fields appear in the WorldCat.org display

In sum: What we have learned to do pretty well Manipulate MARC and MARC-like formats. Manage variation in structure and character encoding. Manage different versions. Reduce and (almost) eliminate data processing silos. Automate what is systematic and regular. Reuse software and metadata subject matter expertise.

But…  We must move toward new paradigms for metadata creation and maintenance that permit:  Greater interoperability and shared metadata.  Mechanisms for allowing metadata to “grow up” over time.

The old and new paradigms Subject Publisher Identifier Contributor Physical description AACR2 encoding ISBD punctuation Non-MARC elementsMARC record

The two paradigms MARC records Record-oriented Tailored to applications in the library community Designed for storage Stable Modern non-MARC records Element or field-oriented Agnostic about how the data will be used. Designed for transmission Dynamic

Where we are Creating MARC and non- MARC metadata, often redundantly. Limited reuse outside the library domain. Metadata created by libraries generally hidden or buried in Web results. Where we want to go Create metadata once, and reuse in different contexts. Expand reuse of metadata from variety of sources for our own context. Contribute our own metadata to the Semantic Web for discovery and metadata creation.

And… We’ll need crosswalks to get there. They are a critical tool for leveraging the investment that the library community has made in the creation of high-quality metadata.

For more information Carol Jean Godby “Mapping ONIX to MARC.” 14.pdfhttp:// 14.pdf. EDItEUR. Karen Smith-Yoshimura, Catherine Argus, Timothy J. Dickey, Chew Chiat Naun, Lisa Rowlison de Ortiz, and Hugh Taylor “Implications of MARC tag usage on library metadata practices” 06.pdf