Hi,
I'm trying to make a small example how to use filter in combination
with Protege. So far I haven't figured out whether I'm making a trivial
mistake in the way I'm trying to use filter, or whether there is a
particular Protigi / JessTab problem that I'm not getting.
I have the following class and subclasses in Protege
(unfortunately the names have spaces, therefore the \):
class: Information\ Element
subclasses: Customer-related\ Information\ Element
Portfolio-related\ Information\ Element
a) WITHOUT any Protege particularities: Assume that ?r is a list with
of instances of Information\ Element,
and now I would like to use filter to get all instances
Customer-related\ Information\ Element, how would the syntax look like?
b) Predicate function: Testing class With Protege and JessTab
I used (mapclass Information\ Element) to assert the facts.
?c1 is a Protege instance of Customer-related\ Information\ Element
Jess> ?c1
<Java-Object:edu.stanford.smi.protege.model.DefaultSimpleInstance>
I can get the class of a Protege instance with a JessTab function and
test for equality
Jess> (eq (class ?c1) Customer-related\ Information\ Element)
TRUE
However, the built-in Jess function instanceof creates a 'Class not
found' error
Jess> (instanceof ?c1 Customer-related\ Information\ Element)
Jess reported an error in routine instanceof
while executing (instanceof ?c1 Customer-related Information Element).
Message: Class not found: Customer-related Information Element.
Program text: ( instanceof ?c1 Customer-related Information Element
) at line 105.
Nested exception is:
Customer-related Information Element
AFAIK this is the expected behavior for mapped Protege instances.
The JessTab function instancep just tests if an instance is a Protege
instance, thus
(filter instancep ?r)
just returns the entire list ?r.
So how do I have to express the predicate function to test the class of
a protege instance?
Thanks in advance for any help.
Dona
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