Hi Roberto,
In a private conversation, you told me this idea is something you "borrowed"
from RDF/OWL. Do you see anything else we should "borrow"?
Do you think we could easily with this evolution map properties to RDF?
Nicolas
On 9/11/06, Roberto Fonti (JIRA) <[EMAIL PROTECTED]> wrote:
more restrictive constraints on a property of a derived node type
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Key: JCR-567
URL: http://issues.apache.org/jira/browse/JCR-567
Project: Jackrabbit
Issue Type: Improvement
Components: core
Affects Versions: 1.0.1
Reporter: Roberto Fonti
Priority: Minor
NodeTypes definition should allow to assign more restrictive constraints
on a property when it is defined for a subtype.
Example:
[rf:Organization] > mix:referenceable, nt:base
[rf:University] > rf:Organization
[rf:Person] > nt:base
- rf:worksFor (reference)
< 'rf:Organization'
[rf:Professor] > rf:Person
- rf:worksFor (reference)
< 'rf:University'
In the example, the property "rf:worksFor" has the constraint
"rf:Organization" when it is defined for a Person,
while it has the constraint "rf:University" (a subtype of Organization)
when it is defined for a Professor (a subtype of Person).
Currently you get a NodeTypeConflictException registering such NodeTypes.
In general, this consideration should apply for all property types (not
only references).
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a+
Nico
my blog! http://www.deviant-abstraction.net !!
