Hi Jack,
SELECT *
WHERE {
?ns spif:prefix ?prefix .
}
produces all prefix declarations. I am not sure what you mean with
"identify all of the prefixes defined in a namespace". Maybe you mean
"in a graph"? What is missing?
Holger
On 7/06/2018 9:11, Jack Hodges wrote:
I know that this is an ancient topic, but I have also seen that TQ
added a couple of functions, smf:prefix that takes a namespace and
returns the prefix, and spif:prefix that is a magic property that
supposedly takes namespaces and returns prefixes. I was hoping that I
could use one of these to get a list of defined prefixes in a
namespace, so that I can provide that information to users (what
prefixes are defined/used in an ontology, and why). The problem seems
to be being able to get the namespaces in the ontology. Its a chicken
and egg problem and it is sad because we have the @prefix definitions
in turtle and the xmlns definitions in rdf. And you are right, I could
write a Java function that would easily identify all of the prefixes
defined in a namespace. I just wonder why it hasn't been made into a
function that is provided with the other functions and magic
properties in TBC. It seems like low-hanging fruit to me.
On Tuesday, July 14, 2009 at 10:01:50 AM UTC-7, Holger Knublauch wrote:
It would actually be doable to implement a SPIN function that takes a
namespace and returns the prefix for it. The function's body would
comprise of a call to smf:qname() followed by smf:substring to get
everything before the :
Otherwise, of course, a Java function could do it, but that requires
more work...
Holger
On Jul 14, 2009, at 9:52 AM, Catrina wrote:
>
> Scott,
>
> That's what I thought, but thought it was worth asking. Thanks for
> the info.
>
> ~Catrina
> >
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