Subject: IdAS questions
> Paul,
>
> There are some questions about IdAS:
>
> 1. In which a way should we use higgins:ContextObject class? Should
> ontology document of Context have only one Individual of
> higgins:ContextObject,
Yes.
that will contain all references/metadata of this
> Context? (By the way we can use owl:Ontology class instead of
> higgins:ContextObject).
The ContextObject instance is necessary because (a) we need to have an
object to which to attach ContextRelationships (the LDAP folks will
create
a
tree of Contexts (by connecting the singleton ContextObject instances in
each Context into a tree (b) We need (e.g. for SecondLife) to have a
place
to attach a couple of metadata properties (e.g. lastConnectionAttempt,
lastConnection) that are about the entire Context
> 2. Interface IContext extends interface IHasMetadata. However
> properties
> higgins:complexMetadata and higgins:simpleMetadata do not have
> higgins:ContextObject as domain class.
This is a bug. Sorry about that. I'll fix this.
> 3. Now SubjectRelationship is a complex attribute. Is there any sense
> to
> use higgins:ContextRelationship as attribute (not Relationship)
too and
> remove IRelationship interface from IdAS (in this case IContext
should
> extend IHasAttributes instead of IHasRelationships)?
I don't know the answer. Please work with Valery to rewrite this
question
to
make the English even more clear and then email to JimS and cc
higgins-dev
> 4. ISimpleValue interface contains a mapping between Higgins OWL
> datatypes/XML schema types/Java classes returned by
ISimpleValue.getData()
> and IdAS basic value implementations. We need to use this mapping to
> determine which implementation of ISimpleValue (BasicValueString,
> BasicValueNormalizedString etc) should we use for appropiate
> subproperty
> of higgins:simpleValue (for example we need to use
> org.eclipse.higgins.idas.impl.BasicValueInteger class in case of
> higgins:integerSimpleValue property). We need the same mechanism for
> properties of ComplexValue, or, more formally, properties like
> pwa:state
> should be subproperties of higgins:simpleValue
(higgins:stringSimpleValue,
> higgins:integerSimpleValue etc).
Interesting question. I think you should email to JimS and cc
higgins-dev
> 5. Higgins.owl schema doesn't contain all types of simple
attribute (as
an
> example, there is no higgins:booleanSimpleValue property for
> org.eclipse.higgins.idas.impl.BasicValueBoolean).
I have been meaning to add these. If you just this one thing for me
(today)
and email it to me, I'll add some other fixes and republish it.
> 6. I propose to add some methods to IContext to support transactions
> (like as begin(), commit() and rollback()).
Please propose this to JimS and cc the higgins-dev list.
> 7.IContextFactory should have some information about a context
(name of
> file of ontology document, URL of context's schema, database
parameters
> etc). Where ContextFactory should it get (store) from? Also, there is
> IContext.setSchema(String schema) method, however we need a schema
> (more
> likely its URL) only when we create new ontology. How should we use
> this
> method? Perhaps we need always to pass both URL of ontology document
> and
> URI of schema to Context's constructor, but use this schema URL
(add as
> imported ontology) only if create new ontology document.
Please propose some ideas on this to JimS and cc higgin-dev. We plan to
discuss this at the F2F tomorrow and Fri.
> 8. IContextFactory interface extends IHasMetadata interface. What
is a
> purpose of this interface and how should we implement it?
I have no idea what JimS was thinking, please ask him and cc the list.
