DAML stands for DARPA agent markup language.
It is a syntax, layered onto RDF and XML, that can be used to describe sets of facts making up an ontology (computer science).
DAML and its friend OIL (ontology integration language) use RDF namespaces to organize and assist with integration of arbitrarily many different and incompatible ontologies.
Articulation ontologies can link these competing ontologies through codification of analogous subsets in a neutral point of view, as is done in the wikipedia.
Current research into DAML is leading toward the expression of ontologies and rules for reasoning and action.
Much of the work in DAML has now been incorporated into OWL.
See also: expert systems, AI, case-based reasoning