[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: What are the characteristics of a good type systemfor XML?

• To: John Cowan <cowan@m...>
• Subject: Re: What are the characteristics of a good type systemfor XML?
• From: James Clark <jjc@j...>
• Date: Wed, 14 May 2003 09:10:34 +0700
• Cc: "Amelia A.Lewis" <amyzing@t...>, xml-dev@l...
• In-reply-to: <20030514013321.GO777@c...>
• References: <44.3113fcc7.2bf15bc1@a...> <20030512233607.78fa7d97.amyzing@t...> <2d3901c31909$e95f8fe0$1401a8c0@snobird> <20030513154522.GA25314@t...> <20030513155334.GE18197@c...> <20030513205803.2ebd3e8e.amyzing@t...> <20030514013321.GO777@c...>
• User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030225

John Cowan wrote:

> This led me to consider what rationalized constraining facets would
> look like.  On the syntactic side, pattern does it all; the RNG rule that
> multiple patterns are ANDed is IMHO superior to the WXS rule that they
> are ORed.

Actually, WXS ANDs in some circumstances and ORs in others: it ANDs the 
the pattern from the base type with the pattern from the restricting 
type, whereas it ORs two pattern facets on the same type.  Thus, trang 
translates:

demo = xsd:string { pattern = "[a-z ]*" pattern=".* .*" }

to

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" 
elementFormDefault="qualified">
   <xs:simpleType name="demo">
     <xs:restriction>
       <xs:simpleType>
         <xs:restriction base="xs:string">
           <xs:pattern value="[a-z ]*"/>
         </xs:restriction>
       </xs:simpleType>
       <xs:pattern value=".* .*"/>
     </xs:restriction>
   </xs:simpleType>
</xs:schema>

James

• References:
  • What are the characteristics of a good type system for XML?
    • From: AndrewWatt2000@a...
  • Re: What are the characteristics of a good type systemfor XML?
    • From: Amelia A.Lewis <amyzing@t...>
  • Re: What are the characteristics of a good type system for XML?
    • From: "Bob Foster" <bob@o...>
  • Re: What are the characteristics of a good type system for XML?
    • From: Amelia A Lewis <amyzing@t...>
  • Re: What are the characteristics of a good type system for XML?
    • From: John Cowan <cowan@m...>
  • Re: What are the characteristics of a good type systemfor XML?
    • From: Amelia A.Lewis <amyzing@t...>
  • Re: What are the characteristics of a good type system for XML?
    • From: John Cowan <cowan@m...>

• Prev by Date: Re: What are the characteristics of a good type systemfor XML?
• Next by Date: [ANN] XML Standards Library 2.0 : Updated 2003-05-14
• Previous by thread: Re: What are the characteristics of a good type system for XML?
• Next by thread: Re: What are the characteristics of a good type system for XML?
• Index(es):
  • Date
  • Thread