Sergey,
I am a newcomer to this aspect of Higgins
and was only trying to understand more about Jim’s approach. He’s
really the one who should answer your question. I’ll just listen and
learn.
Best,
=Drummond
From:
higgins-dev-bounces@xxxxxxxxxxx [mailto:higgins-dev-bounces@xxxxxxxxxxx] On Behalf Of Sergey Lyakhov
Sent: Monday, March 03, 2008 11:15
AM
To: higgins-dev@xxxxxxxxxxx
Subject: Re: [higgins-dev]
preliminary work on "IdAS data model as nodes"
> I’m interested in the “direction you are
going” because XDI also has the requirement to be self-describing. I like
what you’ve done so far. Keep going.
We already
have a set of well-defined IModel interfaces which describe the
context perfectly. Is there any reason/benefits to replace the
existent model with a new proposed?
> It may be
better to not define special interfaces for this purpose, but instead simply
re-use the existing
> interfaces
that are used to access normal information within a Context (nodes and their
attributes).
Why it is better to
use INode interface to describe a model of IContext, IAttribute,
IAttributeValue and others? Really, we see only disadvantages in
describing a context model in such a way. Using of new
model does not look convenient for a user. For an
example, he will need to investigate a complicated
sructure of INode instances to know the list of possible values
of simple attribute (defined by owl:oneOf data
range). Moreover, in case of such a model we
need to create a new special schema to describe HOWL
schema. So, we think that re-using of INode interface is not a
reason to reject existent IModel interfaces. I only agree with "top
node". It will be helpful to add getTopNodeModel() method to IContextModel
interface, and getSuperNodeModel() and getSubNodeModels() methods to
INodeModel interface.
----- Original
Message -----
Sent: Friday,
February 29, 2008 6:45 AM
Subject: RE:
[higgins-dev] preliminary work on "IdAS data model as nodes"
Jim,
I’m interested in the
“direction you are going” because XDI also has the requirement to
be self-describing. I like what you’ve done so far. Keep going.
=Drummond
On
a number of occasions, I've mentioned my desire to explore the notion of using
existing IdAS APIs to access a context's data model (schema).
This
page (http://wiki.eclipse.org/Higgins/ModelAPIs) is
a start, but it needs polish. It has a number of known (to mee) problems
that need to be dealt with. I just thought I'd mention it in case anyone is
interested in at least seeing the direction I'm going.
Jim
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