Re: questions about rdfs:Datatype [Was: RE: Seeking normative definition of datatyping]

The RDF Primer has the sentence:


"As far as RDF is concerned, you can write any pair of URIref and 
literal you want as a typed literal"


In this contex what exactly  is the meaning of 
"understanding"/recognizing a datatype?

Could changes result for an RDF Graph, when a processor "understands" a 
datatype
(aside from taking RDF MT hulls)?

Thanks in addvance for clarification,
rs