Declarative Programming Language
   Growing article, with links to many related topics. [Wikipedia]
   http://en.wikipedia.org/wiki/Declarative_programming_language

Declarative Systems & Software Engineering (DSSE) Group
   University of Southampton, England.
   http://www.dsse.ecs.soton.ac.uk/

RQL
   Description of declarative query language for manipulating RDF files for use in the symantic Web.
   http://139.91.183.30:9090/RDF/publications/www2002/www2002.html

Simple Declarative Language
   Gives easy way to describe lists, maps, trees of typed data in small, easily read form. Simple, intuitive API lets one read, write, access all data structures via one class. Descriptions, documents, FAQ, mail list, downloads. [Open Source]
   http://www.ikayzo.org/confluence/display/SDL/Home

Topics in Information Processing 2CS24: Declarative Languages
   Short, very clear explanations.
   http://www.csc.liv.ac.uk/~frans/OldLectures/2CS24/declarative.html