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> -----Original Message-----
> From: Zielinski, Marek [mailto:mzielinski@gma.com]
> Sent: Tuesday, May 20, 2003 13:47
> To: 'Xml-Dev (E-mail)
> Subject: [xml-dev] Will "AT&T" fit in a string attribute with
> maxLength="4"?
>
>
> I am trying to define restrictions on string lengths using
> Schema. The data actually comes from databases, and is
> exchanged between two different systems. I encountered a
> snag: when the string contains one of the reserved
> characters, like "&", the parser automatically translates it
> into an entity, e.g. &. This increases the length of the
> string, and now the string does not fit; the validator (I am
> using XMLSpy) rejects it as too long.
How can & count as 5 characters, given that it is present in the
infoset as a single ISO/IEC 10646 character? Would & count as 5
characters too?? I hope not.
What does XML Spy check facets against, the XML 1.0 serialization, or
the infoset?
What is the behavior of other tools?
Alessandro Triglia
>
> I could add a couple of characters to the maxLength
> restriction, but this defeats the purpose of length limit.
> Besides, to be safe I would need to make the limit about 4
> times larger than the intended limitation on the actual
> string length. (i.e. if want to limit string to 4 chars, and
> the string happens to be "&&&&")
>
> Any solution? Any way to make the parser decode the entity
> before checking the string length?
>
> -Marek Zielinski
> GMA
>
> Example below: the XML does not validate, although the string
> is originally 'AT&T'.
>
> Sample XML:
> <PhoneCompany Name="AT&T"/>
>
> Sample Schema:
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
> elementFormDefault="qualified" attributeFormDefault="unqualified">
> <xs:element name="PhoneCompany">
> <xs:complexType>
> <xs:attribute name="Name" use="optional">
> <xs:simpleType>
> <xs:restriction
> base="xs:string">
> <xs:maxLength
> value="4"/>
> </xs:restriction>
> </xs:simpleType>
> </xs:attribute>
> </xs:complexType>
> </xs:element>
> </xs:schema>
>
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