extended pointers for P4

[Tomaz Erjavec]

Syd Bauman writes:
 > So -- what does the Council think? On the issue of case of location
 > types, should we
 > 
 > b) change to case sensitive, always lower case;

It does break existing documents, but as they will be broken anyway because
the tag names will become case sensitive, I think it is the least evil
choice.

 > On the issue of whitespace should we
 > 
 > b) make the whitespace between location types and location values,
 >    and between parenthesized steps, optional.

<p>Best,
Tomaz