Return-Path: 
 <ant-dev-return-37595-qmlist-jakarta-archive-ant-dev=jakarta.apache.org@jakarta.apache.org>
Delivered-To: apmail-jakarta-ant-dev-archive@apache.org
Received: (qmail 79035 invoked from network); 6 Sep 2002 12:11:37 -0000
Received: from unknown (HELO nagoya.betaversion.org) (192.18.49.131)
  by daedalus.apache.org with SMTP; 6 Sep 2002 12:11:37 -0000
Received: (qmail 6696 invoked by uid 97); 6 Sep 2002 12:12:07 -0000
Delivered-To: qmlist-jakarta-archive-ant-dev@jakarta.apache.org
Received: (qmail 6678 invoked by uid 97); 6 Sep 2002 12:12:06 -0000
Mailing-List: contact ant-dev-help@jakarta.apache.org; run by ezmlm
Precedence: bulk
List-Unsubscribe: <mailto:ant-dev-unsubscribe@jakarta.apache.org>
List-Subscribe: <mailto:ant-dev-subscribe@jakarta.apache.org>
List-Help: <mailto:ant-dev-help@jakarta.apache.org>
List-Post: <mailto:ant-dev@jakarta.apache.org>
List-Id: "Ant Developers List" <ant-dev.jakarta.apache.org>
Reply-To: "Ant Developers List" <ant-dev@jakarta.apache.org>
Delivered-To: mailing list ant-dev@jakarta.apache.org
Received: (qmail 6666 invoked by uid 98); 6 Sep 2002 12:12:06 -0000
X-Antivirus: nagoya (v4218 created Aug 14 2002)
Message-ID: <36E996B162DAD111B6AF0000F879AD1A76BF9A@nts_par1.paranor.ch>
From: "Wannheden, Knut" <knut.wannheden@paranor.ch>
To: 'Ant Developers List' <ant-dev@jakarta.apache.org>
Subject: RE: xml namespace support in ant2
Date: Fri, 6 Sep 2002 12:20:19 +0200 
MIME-Version: 1.0
X-Mailer: Internet Mail Service (5.5.2448.0)
Content-Type: multipart/alternative;
	boundary="----_=_NextPart_001_01C2558F.0097786A"
X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N
X-Spam-Rating: daedalus.apache.org 1.6.2 0/1000/N

------_=_NextPart_001_01C2558F.0097786A
Content-Type: text/plain;
	charset="iso-8859-1"

> > Other than that you still have to decide on a schema 
> language to use.  I
> > would argue that RELAX NG would be the most suitable for 
> this kind of stuff.
> > But I'm not an expert on this, so maybe someone will disagree.
> 
> For this, DTD is not usable, Schema is possible, but many agree that 
> RELAX NG is the best... if only I knew what it is ;-)
> 

Take a look at the excellent RELAX NG Tutorial
(http://www.oasis-open.org/committees/relax-ng/tutorial-20011203.html).

Just to give you an idea, here is the (complete?) grammar I wrote for
<patternset> (using an XML namespace):


<grammar xmlns="http://relaxng.org/ns/structure/1.0" 
         xmlns:ant="http://jakarta.apache.org/Ant/v2">

 <define name="patternset">
  <element name="ant:patternset">
   <ref name="default-attributes"/>
   <ref name="patternset-content"/>
  </element>
 </define>

 <define name="default-attributes">
  <optional><attribute name="id"/></optional>
  <optional><attribute name="description"/></optional>
 </define>

 <define name="patternset-content" combine="choice">
  <attribute name="refid"/>
 </define>

 <define name="patternset-content" combine="choice">
  <ref name="patternset-attributes"/>
  <ref name="patternset-elements"/>
 </define>

 <define name="patternset-attributes">
  <optional><attribute name="includes"/></optional>
  <optional><attribute name="includesfile"/></optional>
  <optional><attribute name="excludes"/></optional>
  <optional><attribute name="excludesfile"/></optional>
 </define>

 <define name="patternset-elements">
  <zeroOrMore>
   <element>
    <choice>
     <name>ant:include</name>
     <name>ant:includesfile</name>
     <name>ant:exclude</name>
     <name>ant:excludesfile</name>
    </choice>
    <attribute name="name"/>
    <optional><attribute name="if"/></optional>
    <optional><attribute name="unless"/></optional>
   </element>
  </zeroOrMore>
 </define>

</grammar>

Since RNG is very flexible you can write an equivalent grammar in many
different ways.  Just a matter of style and taste.

To play around with RELAX NG I suggest you download Sun's MSV
(http://wwws.sun.com/software/xml/developers/multischema/).

Cheers,

--
knut

------_=_NextPart_001_01C2558F.0097786A--