Assigning a property in OWL DL

Hi,

I've been wondering how to assign a property to an individual in OWL DL. 
I can do it in OWL Full, but the OWL DL syntax won't allow me to do it 
the way I am thinking of. This is what I am currently trying:

  <rdf:Description 
rdf:about="http://ontology.lle.rochester.edu/IRCalSystemAppendix">
    <j.0:ImageProperty 
rdf:resource="http://ontology.lle.rochester.edu/Pics/Diagnostics/Calorimetry/D-AB-R-035_REVA_13.png"/>
    <rdf:type 
rdf:resource="http://ontology.lle.rochester.edu/InfraredFullApertureCalorimeterSystem"/>
  </rdf:Description>

I get these messages from my syntax checker:

Invalid OWL DL syntax in j.0:ImageProperty-statement: 
j.0:IRCalSystemAppendix j.0:ImageProperty j.1:D-AB-R-035_REVA_13.png
    Unknown Resource j.1:D-AB-R-035_REVA_13.png. In OWL DL a type for 
every individual is mandatory (beside 'owl:DeprecatedClass' or 
'owl:DeprecatedProperty').
Unknown Resource j.1:D-AB-R-035_REVA_13.png. In OWL DL a type for every 
individual is mandatory (beside 'owl:DeprecatedClass' or 
'owl:DeprecatedProperty').
This ontology is NOT well-formed.

For reference:

xmlns:j.0="http://ontology.lle.rochester.edu/
xmlns:j.1="http://ontology.lle.rochester.edu/Pics/Diagnostics/Calorimetry/

Also, this is where I define my property:

  <rdf:Description 
rdf:about="http://ontology.lle.rochester.edu/ImageProperty">
    <rdf:type 
rdf:resource="http://www.w3.org/2002/07/owl#AnnotationProperty"/>
  </rdf:Description>

So, I am obviously missing something. I'm not really sure what to do at 
this point. Does anyone have any ideas?

Thanks,
Dan