RE: query regarding validity of RDF file

> Is a tag like this permissible in RDF?
>
> <rdf:RDF
>     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
>     xmlns:lib="http://www.zvon.org/library">
>
> The formal grammar for RDF would seem to say no:
>
> RDF     ::= ['<rdf:RDF>'] obj* ['</rdf:RDF>']
>
> ie you can't declare namespaces as attributes of the root element
> of an RDF document.

RDF/XML works at the level of the infoset rather than a textual level. Hence
the namespace nodes aren't considered except insofar as they inform the
infoset of the elements they are on.

Hence not only is
<rdf:RDF
	xmlns:rdf=http://www.w3.org/1999/02/22-rdf-syntax-ns#"
	xmlns:lib="http://www.zvon.org/library">
allowed, but also one may use:

<RDF
	xmlns=http://www.w3.org/1999/02/22-rdf-syntax-ns#"
	xmlns:lib="http://www.zvon.org/library">

or any other variation on prefixing.