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

characteristics of a good product
Amelia A.Lewis wrote:
> From my perspective: the base type is xmlstring, a sequence of a subset
> of unicode characters (excluding C1, C0 except HT CR LF, the character
> '<', and the character '&' except as the start of an escape sequence). 
> Base type validation is equivalent to well-formedness checking for text
> nodes, then.  The rules for defining a "primitive" type (which further
> constrains the valid lexical space defined by xmlstring) is to define
> the algorithm used for validation.  A primitive type definition SHOULD
> also include the algorithm preferred for comparison/collation (or
> possibly a choice of algorithms).

Wow.  This is basically exactly how you go about defining new attributes 
in directories, esp LDAP.  The only thing LDAP understands is string or 
binary blob.  You define a type identifier (OID), and things like 
display, comparison, and collating syntax.

Way cool.

Rich Salz, Chief Security Architect
DataPower Technology         http://www.datapower.com
XS40 XML Security Gateway    http://www.datapower.com/products/xs40.html


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