W3C home > Mailing lists > Public > public-exi@w3.org > April 2008

[EXI] Clarification required regarding use of types

From: santhanakrishnan <santhana@huawei.com>
Date: Thu, 10 Apr 2008 15:03:29 +0530
To: public-exi@w3.org
Message-id: <000301c89aed$f2fb9600$4a18120a@china.huawei.com>
Hi John

       Consider the following two forms of declaring an element in the
schema

Form1

<xs:simpleType name="tSIP_URL" final="list restriction">

       <xs:restriction base="xs:anyURI"/>

</xs:simpleType>

<xs:element name="MyElement" type="tSIP_URL"/>

 

Form2

<xs:element name="MyElement" type="xs:anyURI"/>

 

As per the EXI specification for the Form1 I would create a Type and
TypeEmpty grammar for the tSIP_URL type and MyElement grammar have Type
grammar start symbol as RHS. Given below will be the grammar

 

tSIP_URL 0  :

              CH [schema-valid value ] Type i, 1 

       tSIP_URL 1  :

              EE

 

       tSIP_URLEmpty 0  : 

              EE

 

       MyElement 0:

              tSIP_URL 0

 

For Form2 no grammar would be created for MyElement. Just a particle term
grammar would be created

ParticleMyElement 0 :

              SE(MyElement) ParticleMyElement 1 

 

       ParticleMyElement 1 : 

              EE

 

Is my understanding correct till here? 

 

As per the specification we have to Evaluate the element contents using the
SE(MyElement) grammar. But we have not created any grammar for MyElement in
the Form2. So, how the contents of the MyElement can be encoded in this
case?

 

Even in the Schema informed grammar example given in the specification the
final grammar has productions of the form

SE("description") Term_description1,1

    But no grammars defined for "description" element content as such.

 

Please clarify my doubts regarding this

 

Regards

Santhanakrishnan
Received on Thursday, 10 April 2008 10:19:19 GMT

This archive was generated by hypermail 2.2.0+W3C-0.50 : Wednesday, 1 October 2008 18:12:36 GMT