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will then not have to know the local methodologies applied for the integration
of metadata information.
4. mEtADAtA VOCABULARy
the need for metadata for the description of document contents is in fact
not new. International standards for the exchange of bibliographic information
and/or library catalogues have been created and are used regularly.
One of these standards, perhaps the most important one, is mARC21,
machine-Readable Cataloguing, which was developed and is maintained by
the American Library of Congress. It offers a records-based system with rather
a large variety of metadata ields. the XmL adaptation of this standard is not
very satisfying because it resembles the abovementioned approach for a common
markup, as can be seen in the following illustration.
01142cam 2200301 a 4500
92005291
DLC 19930521155141.9 920219s1993 caua j 000 0eng
92005291 0152038655: $15.95 DLC DLC DLC lcac
…
A poem about numbers and
theircharacteristics. Features anamorphic, or
distorted, drawingswhich can be restored to normal by
viewing from a particularangle or by viewing the
image’s reflection in the providedMylar cone.
Arithmetic Juvenile poetry.
Children’s poetry, American.
01_2007_5222_txt_ML.indd 90 6-12-2007 15:13:49