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RE: regex help

From: Watkins, Bill <bill.watkins@boeing.com>
Date: Fri, 5 Jan 2007 10:48:10 -0600
Message-ID: <8228AE6F0FF69D4DB1D4A50C72A7CE68017392A1@XCH-SE-2V2.se.nos.boeing.com>
To: "Boris Kolpackov" <boris@codesynthesis.com>
Cc: <xmlschema-dev@w3.org>, "Tsao, Scott" <scott.tsao@boeing.com>

Thanks, Boris, this looks like it does what I need.
Thanks also to Michael and Xan for their help, and Scott Tsao for pointing me at this list.
Bill Watkins 
System of Systems Architect / Engineer
Boeing Satellite Operations and Ground Systems - Houston 
"Any opinions expressed are my own and do not reflect those of Boeing." 
"For every complex problem, there is a solution that is simple, neat, and wrong."  HL Mencken


From: Boris Kolpackov [mailto:boris@codesynthesis.com]
Sent: Fri 1/5/2007 2:19 AM
To: Watkins, Bill
Cc: xmlschema-dev@w3.org; Tsao, Scott
Subject: Re: regex help

Hi Bill,

Watkins, Bill <bill.watkins@boeing.com> writes:

>       <QuotedStringList>
>               "your dog.my_dog" "my_cat$your_cat"
>               "their_rat"
>       </QuotedStringList>
> [...]
>       <xs:simpleType name="QUOTEDNAME_TYPE">
>               <xs:restriction base="xs:string">
>                       <xs:pattern value='\s*"\S([^"]|\s)+\S"\s*'/>
>               </xs:restriction>
>       </xs:simpleType>
>       <xs:simpleType name="QUOTEDNAMELIST_TYPE">
>               <xs:list itemType="QUOTEDNAME_TYPE"/>
>       </xs:simpleType>

The list-based approach won't works since you can have whitespaces inside
list values. In the example above your list will be chopped up as follows:
'"your' 'dog.my_dog"' '"my_cat$your_cat"' '"their_rat"'.

>       <xs:simpleType name="listOfQuotedStrings">
>         <xs:restriction base="xs:string">
>               <xs:pattern value='(("[^"]*")\s+)*'/>
>         </xs:restriction>
>       </xs:simpleType>

This one won't work since it expects at least one whitespace after a
quoted string, even the last one.

>       <xs:simpleType name="listOfQuotedStrings">
>         <xs:restriction base="xs:string">
>               <xs:pattern value='("[^"]*"(\s+"[^"]*")*)?'/>
>         </xs:restriction>
>       </xs:simpleType>

This one is almost there. The only thing you need to add is optional
whitespaces before the first quoted string and after the last (note
the newlines after <QuotedStringList> and before "your dog.my_dog"
as well as after "their_rat" and before </QuotedStringList> -- they
are part of the value):

<xs:pattern value='(\s*"[^"]*"(\s+"[^"]*")*\s*)?'/>


Boris Kolpackov
Code Synthesis Tools CC
http://www.codesynthesis.com <http://www.codesynthesis.com/> 
Open-Source, Cross-Platform C++ XML Data Binding
Received on Friday, 5 January 2007 16:50:36 UTC

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