Re: [Tracker] rdfq and encoding

[Jamie McCracken <jamiemcc blueyonder co uk>]

Fabien VALLON wrote:
> Hi,
>
> It seems that there is problem with encoding when I query a
>
> <rdfq:Condition>
>   <rdfq:and>
>   <rdfq:inSet>
>     <rdfq:Property name="File.Format" />
>     <rdf:String>audio/wav,audio/x-vorbis+ogg,audio/x-mp3</rdf:String>
>   </rdfq:inSet>
>   <rdfq:inSet>
>     <rdfq:Property name="Audio.Album" />
>     <rdf:String>Porgy and Bess</rdf:String>
>   </rdfq:inSet>
>   </rdfq:and>
> </rdfq:Condition>
>
> works  but
>
> <rdfq:Condition>
>   <rdfq:and>
>   <rdfq:inSet>
>     <rdfq:Property name="File.Format" />
>     <rdf:String>audio/wav,audio/x-vorbis+ogg,audio/x-mp3</rdf:String>
>   </rdfq:inSet>
>   <rdfq:inSet>
>     <rdfq:Property name="Audio.Album" />
>     <rdf:String>Albert Collins & Barrelhouse Live</rdf:String>
>   </rdfq:inSet>
>   </rdfq:and>
> </rdfq:Condition>
>
> complains about :
> Error in rdf query parse: Error on line 9: Character ' ' is not valid at 
> the start of an entity name; the & character begins an entity; if this 
> ampersand isn't supposed to be an entity, escape it as &amp;
>
> Should the trackerd rdfq parser do the job right ?

no we use an xmp parser so the xml needs to be well formed which means 
inline ampersands '&', '<' and '>' need to be escaped by you using the 
correct xml escape characters.

Also use should only use inSet with a comma seperated list of values to 
match against. For a single match just use  "<rdfq:equals>" instead for 
the Audio.Album part

hope that helps


--
Mr Jamie McCracken
http://jamiemcc.livejournal.com/