[docbook] DocBook Index: more than three levels needed

["LaRae Chasteen" <lchasteen at municode dot com>]

Greetings!

 

We are beginning to use DocBook to mark up codes of ordinances, and it is serving quite well! The books we publish, however, include in-depth indexes, with up to six levels of entries. Here is an example of an index entry from one of our publications:

 

ALCOHOLIC BEVERAGES

=Fines, forfeitures and other penalties

==Excise taxes

===Collection

====Refund of tax, penalty or interest paid more than once or illegally collected ..... &sect;6-156

 

As far as we can see, the levels provided in DocBook (<primary>, <secondary> and <tertiary>) are not going to be in-depth enough to accommodate this level of indexing.

 

This is what the mark-up might look like, but we need suggestions on how to handle the entries AFTER the tertiary level:

 

<section>

    <title>Sec. 6-156. Refund of tax, penalty or interest paid more than once or illegally collected</title>

...

<indexterm>

<primary>ALCOHOLIC BEVERAGES</primary>

<secondary>Fines, forfeitures and other penalties</secondary>

<tertiary>Excise taxes</tertiary>

<what here?>Collection</what here?>

<what here?>Refund of tax, penalty or interest paid more than once or illegally collected</what here?>

<indexterm>

...

</section>

 

We are hoping for advice from anyone who may have already encountered this issue, or thoughts about how we might handle it.

 

(Note that our product of primary concern is the printed version, and for this, we have XyEnterprise's XML Professional Publisher v7.2c.1, which can "extract" and print up to nine levels of index entries...that is, once we define the nine levels in mark-up for it to consume.)

 

Gratefully,

LaRae Chasteen
Municipal Code Corporation
lchasteen@municode.com