background image
O p e n A rc h i ve s I n i t i a t i ve
In setting up a new database schema in CONTENTdm, it is also possible to develop a data-
base that is not at all mapped to the Dublin Core elements. However, we chose our schema for
"Digital Emblematica" to ensure that as many as possible of the fields were mapped to Dublin
Core fields. This was because of the ease of mapping with the software, and also because the
Library was also involved in a number of projects that use the Open Archives Initiative Metada-
ta Harvesting Protocol (OAI-PMH).
9
The purpose of the OAI-PMH is to facilitate the "effective dissemination of content."The
University of Illinois Library has received a number of grants to fund projects that make use of
the OAI-PMH.We have set up a service provider facility where we harvest the metadata from
numerous other collections,
10
and we have built value-added services on top of the harvested
metadata. It therefore made sense also to ensure that our digitized emblem collection would be
exposed to metadata harvesting. In addition, the OAI-PMH recommends that metadata be har-
vested in Dublin Core format and anticipating that sometime in the near future we would allow
our "Digital Emblematica" metadata to be harvested, we tried to map most of the metadata fields
to the Dublin Core format.The CONTENTdm software (ver. 3.5) is already OAI-compliant so
altogether, mapping to Dublin Core fields made a lot of sense.
S a m p l e D a t a
When someone chooses to export the metadata from a CONTENTdm database, the software
must be configured appropriately, but this is merely a simple matter that can be completed in a mat-
ter of seconds. CONTENTdm offers a number of choices in data export. Data can be exported in
ASCII-delimited format, with or without the field names as the first record. Data may be exported
in XML format and also in OCLC SiteSearch format. In addition, as mentioned above, it may be
harvested using the OAI protocol. Illustration 2 shows an example image from the book, Himmlisch-
er Liebes-Kuß by Müller.
11
We will show in the following examples of the metadata that is pertinent to
this image and how it might be exported using the various CONTENTdm allowable options.
9
http://www.openarchives.org.
10
http://oai.grainger.uiuc.edu and
http://imlsdcc.grainger.uiuc.edu.
11
All images from Müllers Himmli-
scher Liebes-Kuß are available online
at http://images.library.uiuc.
edu:8081/cgi-bin/htmldoc.exe?
CISOROOT=/emblems&CISOP
TR=324.While almost all of the
emblem books which are being digi-
tized do not have page numbers, this
particular book has page numbers,
simply counting from the first page.
Hence the image shown in illustra-
tion 2 is called page 39.
Field Name
Dublin Core
Mapping
Data
Type
Large
Field
Search-
able
Hidden
Controlled
Vocabulary
Book Identifi er /
Call No.
Identifi er
Text
No
No
No
Yes
Place of
Publication
None
Text
No
No
No
Yes
Publisher
Publisher
Text
No
No
No
Yes
Date of
Publication
Coverage-
Temporal
Text
No
Yes
No
Yes
Bibliographic
Identifi er
Identifi er
Text
No
No
No
Yes
Book Memo
Description
Text
Yes
No
No
No
Technical Details
Description
Text
Yes
No
No
No
Rights
Rights
Text
Yes
No
No
Yes
Location
Contributors
Text
No
No
No
Yes
Illustration 1: Field properties for the "Digital
Emblematica" database. Illustration courtesy of
"Digital Emblematica," University of Illinois Library.
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