A couple more refs on metadata:
The W3C recommendation for metadata syntax and datamodel is RDF, the
Resource Description Framework. There's a lack of really accessible
introductory material to RDF, but you can find some interesting links at
http://www.w3.org/RDF/ and some informal 'design issue' discussion
papers on RDF and the 'Semantic Web' at http://www.w3.org/DesignIssues/
The distributed harvesting of metadata model is a nice one; it would be
fun to revisit this using Swish/DC/RDF, as a testbed for combining
RDF-oriented search with fast free text searching...
On Sat, 11 Mar 2000, Steve Thomas wrote:
> PropheZine Owner wrote:
> > Hi:
> > I was wondering if you could take a step backwards and explain Metadata.
> > Not sure what that is.
> Metadata is "data about data" -- that is, in this case, data which describes
> some file of information, e.g. an html file, a pdf file, an excel spreadsheet, ...
> HTML permits the inclusion of metadata using the META tag in the HEAD section.
> This is usually (in this context) ecoded as
> <META NAME="metaname" CONTENT="some text">
> where metaname can be anything you like really. E.g. many people use
> <META NAME="author" CONTENT="Steve Thomas">
> <META NAME="description" CONTENT="This is an email message describing metadata">
> <META NAME="keywords" CONTENT="swish; meta data; metadata">
> Now, the important thing to note is that the above is arbitrary. To make this
> useful to a wide range of users and uses, you need agreed standards about what
> metanames will be used, what they mean, and how their content is to be coded.
> One such standard is "Dublin Core" -- which is so named because it was agreed
> at a meeting in Dublin, Ohio, and is meant to provide a CORE set of names --
> not the be-all and end-all, just a core set of elements. Dublin Core is now widespread.
> You can find lots more detail from my Bookmarks page at
> Stephen Thomas, Senior Systems Analyst
> Mail : Barr Smith Library, The University of Adelaide, South Australia 5005
> Phone: (08) 8303 5190 Fax: (08) 8303 4369
> Email: stephen.thomas@ adelaide.edu.au
> URL : http://www.library.adelaide.edu.au/~sthomas/
> ** Unless otherwise stated, the content of this message reflects only my **
> ** own opinion, and not the policy of the University of Adelaide Library.**
> "I must Create a System, or be enslav'd by another Man's" -- William Blake
Received on Sat Mar 11 06:37:56 2000