Clarification of precedence

Hi all,

While preparing the tagset document for publication, I realized s.t. is
missing at http://www.w3.org/TR/2006/WD-its-20060222/#selection-precedence

I added a rule 6 (lowest precedence: default selections for data
categories) and a sentence about conflicts between multiple
documentRules elements. This is nothing new, but we had not written it
up so far.

So instead of

[[[The following precedence order is defined for selections of ITS
information in various positions (the first item in the list has the
highest precedence):
   1.
      Implicit selection in instance documents (data category attributes
on a specific element)
   2.
      Selections in instance documents (using a documentRules element)
   3.
      Selections in an external file (using a documentRules element)
   4.
      In a schema, selections expressed with a documentRules element
   5.
      Selections expressed with schemaRule (See also the note in Section
4.1.2: Rule-based Selection)]]]

we have now

[[[The following precedence order is defined for selections of ITS
information in various positions (the first item in the list has the
highest precedence):
   1.
      Implicit selection in instance documents (data category attributes
on a specific element)
   2.
      Selections in instance documents (using a documentRules element)
   3.
      Selections in an external file (using a documentRules element)
   4.
      In a schema, selections expressed with a documentRules element
   5.
      Selections expressed with schemaRule (See also the note in Section
4.1.2: Rule-based Selection)
   6.
      Selections via defaults for data categories, see Section 5.1:
Position and Default Selections of Data Categories

In case of conflicts between selections via multiple documentRule
elements, the last selector has higher precedence.]]]

Cheers,

Felix