title: Can I extend ID and IDREF to make it support characters:colon,slash,space?
body: <p>I have some xml document and this xml has some elements whose attribute value is unique(eg: name). I want to use xs:ID to identify it in XSD.
  My question is: 
  Is there any way to extend xs:ID to make it support characters: colon, slash, space? Because the attribute "name" maybe have these characters.</p>
  
  <p>I know there are some alternatives, eg: using xsd:key in XSD or using XSLT to validate by xsl:key. But I still like to ask if there is a way to extend xs:ID (eg: override some facts).</p>
  
  <p>The main reason is the auto-completion feature of my xml editor (Oxygen XML Editor) only support xs:ID and xs:IDREF. (Maybe we can write some Editor plugin to support it, but it's very ugly. Because it will lead to editor dependency and we will write java code instead of xml.)</p>