RE: query regarding validity of RDF file from Jon Hanna on 2003-02-12 (www-rdf-interest@w3.org from February 2003)

From: Jon Hanna <jon@spin.ie>
Date: Wed, 12 Feb 2003 13:05:03 -0000
To: <www-rdf-interest@w3.org>
Message-ID: <NDBBLCBLIMDOPKMOPHLHAEOOENAA.jon@spin.ie>

> 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.

Received on Wednesday, 12 February 2003 08:04:20 UTC