I am sending this to sioc-dev too, as sioc was thinking of using
the :Content element from atom-owl.
As I am thinking of changing this, I thought you should know.

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Hi, my previous post was a little long, which may not have made it
clear that I am thinking of changing the ontology.

The idea is to use literals wherever they seem obviously suited. This
requires us to use create the following new literal types:

- :xhtml
- :html
- :xml

I had thought of doing this before but was help up by two things
(that I can remember)

1. I had not seen literals used widely with special types
2. This would then mean that the :content relation would point
sometimes to a literal, sometimes to a object, which would not be OWL-DL
3. It seemed more flexible to not use literals

To take these points one by one:

1. Special Literals
-------------------

I have just discovered that Fresnel uses its own Literal types such
as fresnel:styleClass.
So for example in http://simile.mit.edu/repository/longwell-demos/
atom/fresnel.n3 one can find

:generatorFormat rdf:type fresnel:Format ;
fresnel:propertyFormatDomain atom:generator ;
fresnel:propertyStyle "atom-generator"^^fresnel:styleClass ;
fresnel:valueStyle "atom-generator-
value"^^fresnel:styleClass ;
fresnel:group :atomgr .

2. The :content relation
------------------------

If we think of a element with a source as below