Xlink 1.1 Schema - data type of roles and arc roles

Although section section 5.5
(http://www.w3.org/TR/2005/WD-xlink11-20050428/#link-semantics
<http://www.w3.org/TR/2005/WD-xlink11-20050428/> ) says that arc roles and
roles have to be IRI's (Internationalized Resource Identifiers
http://www.ietf.org/rfc/rfc3987.txt), the non-normative schema does not
enforce it.  XBRL
(http://www.xbrl.org/Specification/XBRL-RECOMMENDATION-2003-12-31+Corrected-
Errata-2005-04-25.htm) has a schema for Xlink 1.0; the non-normative version
(http://www.xbrl.org/2003/XLink-2003-12-31.xsd) puts more constraints on the
types of attributes.

Walter Hamscher | www.hamscher.com | Vice Chair, XBRL International |
Consultant to PricewaterhouseCoopers