private static void BuildIdentityConstraint_Refer(XsdBuilder builder, string value)
{
if (builder._identityConstraint is XmlSchemaKeyref)
{
((XmlSchemaKeyref)builder._identityConstraint).Refer = builder.ParseQName(value, "refer");
}
else
{
builder.SendValidationEvent(SR.Sch_UnsupportedAttribute, "refer");
}
}