The bibliographical schemes are sets of description of standardized metadata what are used for bibliographical classification. NOTE: I wager it has one more formal definition.
Abbreviation RDF respond (IF I AM NOT MISTAKEN) to Resource Framework Description, this is a standard of the W3C for the codification of bibliographical descriptions using XML technologies.
One of the advantages of the RDF design is that, thanks to name spaces of XML, a description can be stored in a form of XML document completely transparent. That facilitates the maintenance of both enormously.
RDF is being developed quickly in the industry of software (commercial and free) and the new versions of the most important navigators contemplate to implement it.
Whenever it is possible we tried to use standardized schemes in RDF, XML or in other technologies adapting them, if it is precise, to new medial.
Some interesting schemes are
OMF, for free documentation;
lsm, for free software;
rdf/rpm (I don't know its exact name) to catalogue RPM software packages
UDDI, new norm for the cataloguing and publication of services B2B in Internet;
donantonio-biblo pending to define), for the publication and diffusion of servers.
It is not the intention of this technology to contaminate opened standards, but for this technology works as it is expected it is precise to codify certain information in each description.
It's pending to solve if this information can be transparently codified by the name spaces or its precise to create minimal variants of the schemes to use.