RDF is a W3C initiative. I have pet theory that sucessful W3C data formats go through four stages:
RDF/XML is still somewhere in steps 2 and 3: There's not a lot of RDF/XML on the Web yet, and nobody's written the killer application that end-users will go crazy for. I do not have the programming chops to take care of Step 3, but I know just enough Perl to write some scripts that might get more RDF/XML onto the Web, so that real programmers have more motivation to develop real programs.
All of these scripts take advantage of the fact that there's a lot of "legacy data" suitable for translation into RDF/XML: address books, directory server databases, instant messenger contact lists, and even HTML files have subject/predicate/object data that can be translated into popular RDF vocabularies like FOAF and Dublin Core. All these scripts do is translate the data you already have.
vcard2foaf.pl converts vCard files (as defined in RFC 2426 and its predecessors) into FOAF files.
Lots of e-mail programs (including Microsoft's Outlook Express) can exchange address book information in vCard format. This script lets you quickly convert that information into FOAF data.
ldif2foaf.pl converts LDAP Data Interchange Format (LDIF) files (as defined in RFC 2849) into FOAF files.
The mail programs included with the Netscape and Mozilla web browsers both export address book data in LDIF. This script can convert your entire address book into FOAF -- then all you'll need to do to create a useful FOAF file is add a description for yourself.
rdfscrape.pl analyzes HTML files and produces RDF/XML metadata files describing those HTML files. Most of the RDF/XML produced by this script is Dublin Core format, but FOAF, Creative Commons, and some other schemas are available as command-line options.
If you need RDF/XML descriptions for a large set of files, rdfscrape.pl can describe an entire directory of files in one pass. (Most of the XML metadata on bauser.com was created with rdfscrape.pl.)
Go to rdfscrape.pl's homepage.
clb2foaf.pl converts the contact list backup files produced by ICQ (versions 2001 through 2003) into a very simple FOAF files.
To be honest, clb2foaf.pl is not a terribly useful script, because there isn't much information in a contact list backup. It can be a start towards building a real FOAF file -- covert your ICQ contacts into a list, then add some more details by hand.
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