Re: xml comment syntax

On 08/07/2014 09:16 PM, Carlo Capelli wrote:
> Well, really of little importance, but I can't determine if this is really
> an error:
> 
>   <!--- Replaced so that we have a unionOf construct
>         Aug 20 02 MKS, suggestion by R. Volz.
> 
>   <owl:Class rdf:ID="Fruit">
>     <rdfs:subClassOf rdf:resource="#EdibleThing" />
>   </owl:Class>
> 
>   -->
> 
> as reported while running thea2 unit tests:
> 
> Warning: Unknown file-extension: . Assuming RDF/XML
> 
> ERROR: SGML2PL(xmlns):
> http://www.w3.org/TR/2003/PR-owl-guide-20031209/food:869: Illegal comment,
> found "<!---"
> 
> % Parsed "http://www.w3.org/TR/2003/PR-owl-guide-20031215/food" in 0.06
> sec; 954 triples
> 
> 
> wikipedia <http://en.wikipedia.org/wiki/XML#Comments> informal description
> seems suggest that should be valid...

The WikiPedia text is not very explicit.  The code is (parser.c in sgml
package)

    case S_CMT1:			/* <!-- */
    { if ( f[CF_CMT] == chr )		/* <!--- */
      { if ( IS_XML_DIALECT(dtd->dialect) )
	  gripe(p, ERC_SYNTAX_ERROR, L"Illegal comment", L"<!---");
      }
      p->state = S_CMT;
      return TRUE;
    }

It is long ago, but it seems I programmed this quite deliberately (I
think it
should be a warning; the parsing just accepts it as a comment).  So, I'll
leave the search for whether or not this is allowed to you :-)  And I'll
only accept references from the official XML standard or approved XML
test cases.  There are plenty incorrect claims floating on the web ...

	Cheers --- Jan