@instanceof tests

Dear all,

Ralph made me realize last week that our test case suite[1] does not
contain any tests for @instanceof. It is probably a good idea to have
those, which would help us in finalizing the issues. So, urged by
Ralph:-) I created some. I attach those.

Michael, I did not want to directly upload them and modify the wiki
page, I am not sure how you prefer to manage them, hence my attachement.
I tried to follow the style of earlier tests, and I numbered them
starting 0050. Here is what they are:

0050: @instanceof with @rel present, no @href, @resource, or @about
0051: @instanceof with @rel and @resource present, no @about
0052: @instanceof with @about and @rel present, no @resource
0053: @instanceof with @about, no @rel or @resource
0054: @instanceof without anything else
0055: @instanceof with a single @property
0056: @instanceof with @resource and nothing else
0057: @instanceof with @resource and nothing else, with a subelement

Among those there are some that are not really controversial and the
sparql entries are quite obvious. The ones which seem to be a bit
controversial are 0054 and 0055; I tried to follow the spirit of what is
currently in the syntax document in creating the sparql entry, but I
guess that should be discussed.

I claim that 0050, though the sparql version seems to be what we want,
would _not_ pass a machine following the current document, see[2].

I also believe that 0053 would not pass the current specification
either. The reason is that the current version sets the chaining flag if
the instanceof part generates any triple, which means that the [current
object resource] (a newly generated blank node in this case) will be
inherited by the children and not the value of @about

I hope all this helps

Ivan

[1] http://www.w3.org/2006/07/SWD/wiki/RDFaTC
[2]
http://lists.w3.org/Archives/Public/public-rdf-in-xhtml-tf/2007Sep/0202.html

-- 

Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
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