[dsml] Attribute type names in DSMLv2

[Rob Weltman <robw@worldspot.com>]

   The drafts up to this point declare the OID type to be either NumericOID or xsd:NMTOKEN. However, xsd:NMTOKEN allows characters and character sequences which are not allowed by LDAPv3. [LDAPv3] says:

    A specification may also assign one or more textual names for an
    attribute type.  These names MUST begin with a letter, and only
    contain ASCII letters, digit characters and hyphens.  They are case
    insensitive.  (These ASCII characters are identical to ISO 10646
    characters whose UTF-8 encoding is a single byte between 0x00 and
    0x7F.)


   This implies something like:

<xsd:simpleType name="OID">
	<xsd:union memberTypes="NumericOID AttributeTypeName"/>
</xsd:simpleType>
<xsd:simpleType name="AttributeTypeName">
	<xsd:restriction base="xsd:string">
		<xsd:pattern value="[a-zA-Z]+([a-zA-Z0-9]|[-])*"/>
	</xsd:restriction>
</xsd:simpleType>


   I'm not a regex wiz, so that might not be exactly right.

Rob


[LDAPv3] http://www.ietf.org/rfc/rfc2251.txt?number=2251