Thomas Mueller wrote:
I was just not sure what you meant with 'entire industry'. I agree XML
is important for document processing (however I would have probably
used JSON). But in my view, most data is still accessed using SQL or
directly from the file system.
I am not talking about IO or how and where documents are stored, I am talking
about data interoperability.
Just google 'xml data interoperability' and you will see exactly what it is and
what has been done about it.
B.t.w. I integrated Saxon XQuery 1.0 engine into JCR 1.2.
How does this work, does it convert XQuery to XPath?
XPath is a subset of XQuery so XQuery can't be converted into XPath.
Integration is straight forward - custom URI resolver and simple SAX
transformer. It is very inefficient but work out of the box.
XPath
For me, XPath was always quite complicated. I would probably get used
to it, but I prefer more verbose languages.
I can see, that you come from old school DB background, and I can understand
you. I can say that XPath are more intuitive than SQL, after a chapter or two
about XPath.
* AQM - design to work with JCR Object model and so has limited
functionality
What functionality are you missing?
I am missing XPath & XQuery as a part of the spec.
And as I sad before AQM is home-grown and it will take a few years to make it
work, when XQuery already mature enough, i believe if you have a look at AQM and
XQuery specs you will see what exactly AQM missing.
So in your view, JCR is an XML database? For me, JCR is:
- File System
- RDBMS
- LDAP
- Subversion
JCR is a content repository and it can not be an RDBMS because JCR data model
include 2 major entities: Node and Property that RDBMS could not understand.
Please don't mix persistence layer with JCR.
So you suggest the Jackrabbit persistence should be an XML database?
And you would remove support for RDBMS / file system persistence /
Lucene?
I can see that you mixing up persistence engine, indexing and JCR all together.
Wouldn't that be quite a big change and restriction?
None.
--
Ivan Latysh
[EMAIL PROTECTED]
