I'm assuming a general format of:
<field type="" name="" format="" options="" > </field>

Commented fields would be implemented much later - though I'doubt the rest of them will be implemented very quickly either ;-)

Fields independent of position within document

<field type="author" options="full|initials"> </field>
<field type="comments"> </field>
<!-- <field type="docproperty"> </field> -->
<field type="filename" options="relative|full|noext"> </field> 
<field type="filesize"> </field>
<field type="filetime" options=""> </field>
<!-- <field type="template"> </field> -->
<field type="lastsavedby"> </field>
<field type="numchars" [format="ff"]> </field>
<field type="numwords" [format="ff"]> </field>
<field type="numpages" [format="ff"]> </field>
<field type="numparagraphs" [format="ff"]> </field>
<!-- <field type="revnum" [format="ff"]> </field> -->
<field type="subject"> </field>
<field type="title"> </field>
<field type="keywords"> </field>


User Info - constant for whole instance of AbiWord

<field type="useraddress"> </field>
<field type="userinitials"> </field>
<field type="username"> </field>

Fields relating to position in document

<field type="pagenumber" format="ff"> </field>
<field type="section" format="ff"> </field>
<field type="sectionpages" format="ff"> </field>

Fields dependant on bookmarks

<field type="pageref" refname="bookmark" format="ff"> </field>
<field type="ref" refname="bookmark"> </field>
<!-- <field type="chapterref" refname=""> </field> -->

Sequence fields

<field type="seq" name="" [bookmark=] format="ff">

List/Heading/In paragraph numbering?

<field type="autonumber" format="">
<field type="listnumber" format="">

Misc
<field type="time" format=""> to replace <field type="time"/> 
I'm sceptical about this, wouldn't file time or created time be more useful? This is effectively asking to be a clock embedded within your document!


I'm not at all sure about the next one
<field type="toc" styles="style1,style2..." sequences="figures;tables">

The time format could consist of [ .,:/-] as is plus the following:

Sample time 13:40:05 9 February 2000
day of month
D  = 9
DD = 09
DDD = 9th
W = Wed        } Star office uses N!
WW = Wednesday }
M = 2
MM = 02
MMM = Feb
MMMM = February
YY = 00
YYYY = 2000
mm = 40
ss = 05
hh = 13
hh ap = 1 pm } Star office uses AM/PM 
hh AP = 1 PM

eg <field type="filetime" options="hh:mm ap WW MMM DDD, YYYY">
1:40 pm Wednesday Feb 9th, 2000 

I'm assuming ff would be similar to that used for lists
ie (using 11 as an example value)

%i xi
%I IX
%a k
%A K
%h 0xa ie hex 0-9a-f a gimmick for us programmers?
%H 0xA ie hex 0-9A-F ?
%* whatever the format of the previous field was - probably only applicable for sequences.

For reference the current fields seem to be:
<field type="list-label"/> 
<field type="time"/> 
<field type="page_number"/>
<field type="page_count"/>