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Posted to xindice-users@xml.apache.org by Federico Tonioni <li...@inwind.it> on 2003/01/15 10:11:46 UTC
DTD or Schema
Hi to all!
I would like to know which data model Xindice associates or uses to handle data.
I am curious to know if using a dtd rather than a schema (or viceversa) the performances of data indexing and retrieval would improve.
Thank you in advance
Federico
Re: DTD or Schema
Posted by Lachlan Donald <la...@ljd.cc>.
>
> > Some people need DTDs and XML Schema support. Others of us do not.
So,
> > currently,
> > if you need it, then you have to layer it on top.
>
> Sorry, but i need to know if using a successful validation against a given
> schema how the performance would improve...
>
> and, more practically, how can i associate a .xsd to a given collection of
> documents?
>
Xindice at present cannot work with either XML Schema or DTDs. If you want
to use either of them you will have to work with them outside of Xindice.
Castor is useful for this sort of thing:
http://www.castor.org/xmlschema.html
Cheers,
Lachlan Donald
Re: DTD or Schema
Posted by Federico Tonioni <li...@inwind.it>.
> Some people need DTDs and XML Schema support. Others of us do not. So,
> currently,
> if you need it, then you have to layer it on top.
Sorry, but i need to know if using a successful validation against a given
schema how the performance would improve...
and, more practically, how can i associate a .xsd to a given collection of
documents?
please forgive me if my questions sounds stupid:-)
Fede
Re: DTD or Schema
Posted by Murray Altheim <m....@open.ac.uk>.
Mark J. Stang wrote:
> Some people need DTDs and XML Schema support. Others of us do not. So,
> currently,
> if you need it, then you have to layer it on top. I don't want it because I need
> the flexibility and
> I don't want the overhead.
>
> My 0.02 :-).
>
> Mark
I agree. It's extremely easy to provide an XML validator (WF or
valid) as a service, using Xerces, which is already in the source
tree. Where, when and how the validation occurs varies enormously
during a document life cycle, and it's IMO foolish to pretend that
validation is some sort of monolithic process that is applied only
at one specific stage.
Murray
......................................................................
Murray Altheim <http://kmi.open.ac.uk/people/murray/>
Knowledge Media Institute
The Open University, Milton Keynes, Bucks, MK7 6AA, UK
"In Las Vegas Mr Gates also demonstrated a prototype
fridge magnet which can be programmed to receive traffic
reports, sports results and advertisements from local
restaurants using the same FM signal as the wristwatch."
-- The Guardian, 10 Jan 2003.
Re: DTD or Schema
Posted by "Mark J. Stang" <ma...@earthlink.net>.
Some people need DTDs and XML Schema support. Others of us do not. So,
currently,
if you need it, then you have to layer it on top. I don't want it because I need
the flexibility and
I don't want the overhead.
My 0.02 :-).
Mark
Christian Gross wrote:
> At 12:08 15/01/2003 +0100, you wrote:
> >Hi,
> >
> >
> >Xindice isn't using XML validation at this time, and i don't know if its
> >planned.
> >So its up to you what are u putting in your xindice.
> >My Tip when u program in Java just use the SUN MSV Validation package, this
> >works quite easy and fast.
> >You can store the XSD's in Xindice too, cause its XML like your documents.
>
> I do not know if having complete XML Schema support is such a good
> thing. The reason why I mention this is because of XML Query. Consider
> the following of XQuery 1.0 and XPath 2.0 data model section 3.3
>
> ******************************
> In other words, the data model supports the following classes of XML documents:
>
> * Well-formed documents conforming to [Namespaces in XML],
> * DTD-valid documents conforming to [Namespaces in XML], and
> * W3C XML Schema-validated documents.
>
> The data model supports some kinds of values that are not supported by [XML
> Information Set]. Examples of these are well-formed document fragments,
> sequences of fragments or sequences of documents. The data model also
> supports values that are not nodes. Examples of these are atomic values,
> sequences of atomic values, or sequences mixing nodes and atomic values.
> These are necessary to be able to represent the results of intermediate
> expressions in the data model during expression processing.
> ******************************
> The result is that Xindice may in the future have to support both XML
> documents with and without DTD and Schema's.
>
> Just my two cents though...
>
> Christian Gross
--
Mark J Stang
System Architect
Cybershop Systems
RE: DTD or Schema
Posted by Christian Gross <ma...@devspace.com>.
At 12:08 15/01/2003 +0100, you wrote:
>Hi,
>
>
>Xindice isn't using XML validation at this time, and i don't know if its
>planned.
>So its up to you what are u putting in your xindice.
>My Tip when u program in Java just use the SUN MSV Validation package, this
>works quite easy and fast.
>You can store the XSD's in Xindice too, cause its XML like your documents.
I do not know if having complete XML Schema support is such a good
thing. The reason why I mention this is because of XML Query. Consider
the following of XQuery 1.0 and XPath 2.0 data model section 3.3
******************************
In other words, the data model supports the following classes of XML documents:
* Well-formed documents conforming to [Namespaces in XML],
* DTD-valid documents conforming to [Namespaces in XML], and
* W3C XML Schema-validated documents.
The data model supports some kinds of values that are not supported by [XML
Information Set]. Examples of these are well-formed document fragments,
sequences of fragments or sequences of documents. The data model also
supports values that are not nodes. Examples of these are atomic values,
sequences of atomic values, or sequences mixing nodes and atomic values.
These are necessary to be able to represent the results of intermediate
expressions in the data model during expression processing.
******************************
The result is that Xindice may in the future have to support both XML
documents with and without DTD and Schema's.
Just my two cents though...
Christian Gross
Re: DTD or Schema
Posted by Federico Tonioni <li...@inwind.it>.
i would like to know if i give some schema.xsd (if it is possible!!!) to
Xindice, it will search the data or validate a whole document in a more
efficent way.
is that a functionality that it could be implented soon in xindice? or are
they any ideas to make developement in this direction?
sorry for too much questioning:-)
thank you.
Federico
----- Original Message -----
From: "Stefan Lischke" <li...@novacom.net>
To: <xi...@xml.apache.org>
Sent: Wednesday, January 15, 2003 12:08 PM
Subject: RE: DTD or Schema
> Hi,
>
> > Hi to all! I would like to know which data model Xindice
> > associates or uses to handle data.
>
> Try to search about B-Tree algorithms in Google.
>
> > I am curious to know if using
> > a dtd rather than a schema (or viceversa) the performances of
> > data indexing and retrieval would improve.
>
> Xindice isn't using XML validation at this time, and i don't know if its
> planned.
> So its up to you what are u putting in your xindice.
> My Tip when u program in Java just use the SUN MSV Validation package,
this
> works quite easy and fast.
> You can store the XSD's in Xindice too, cause its XML like your documents.
>
> hope that helps to start your search in the Xindice&XML universe ;)
>
> mfg stefan
>
>
RE: DTD or Schema
Posted by Stefan Lischke <li...@novacom.net>.
Hi,
> Hi to all! I would like to know which data model Xindice
> associates or uses to handle data.
Try to search about B-Tree algorithms in Google.
> I am curious to know if using
> a dtd rather than a schema (or viceversa) the performances of
> data indexing and retrieval would improve.
Xindice isn't using XML validation at this time, and i don't know if its
planned.
So its up to you what are u putting in your xindice.
My Tip when u program in Java just use the SUN MSV Validation package, this
works quite easy and fast.
You can store the XSD's in Xindice too, cause its XML like your documents.
hope that helps to start your search in the Xindice&XML universe ;)
mfg stefan