Nested styles in CS2. Absence of property appliedNestedStyle

Question

In task I'm working on there is a subtask of extracting overrides from the text.
The way I implement it is pretty straightforward: I iterate through all textStyleRanges. With each textStyleRange object I compare its style properties with style properties of paragraphStyle and characterStyle that are applied to it.
Things are getting harder when nested styles come into play.
When they are applied, they should be taken into account along with appliedParagraphStyle and appliedCharacterStyle.
This issue also affects Drop Caps. When the character style is applied to Drop Cap this character style becomes nested.
In CS3 scripting objects (textStyleRange, text, etc) has property appliedNestedStyle. So to extract overrides I can use it.
But in InDesign CS2 there is no such property...
So the question is how can I get applied nested style in CS2? Or maybe some workaround to accomplish the same goal?

Answer 1

Indexes
Scripting indexes has changed a lot. It finally works, and it works well. The property 'subtopic' has gone, instead you iterate the property 'topic' (up to three times). The following lines illustrate:
if( app.activeDocument.indexes.length == 0 )
myIndex = app.activeDocument.indexes.add()
else
myIndex = app.activeDocument.indexes[0]
//create main topic
myIndex.topics.add('dog')
//create subtopics
myIndex.topics.item('dog').topics.add('collie')
myIndex.topics.item('dog').topics.add('setter')
myIndex.topics.item('dog').topics.item('collie').topics.add('border collie')
myIndex.topics.item('dog').topics.item('collie').topics.item('border collie').topics.add('*****')
You can address (sub)topics by asking for topics embedded under topics:
myIndex.topics[0].topics[0].topics[0].topics[0].name
is the first subtopic of the first subtopic of the first subtopic of the first topic.
A new property is allTopics: myIndex.allTopics returns an array of all (sub)topics. This is a flat, one-dimensional, array, i.e. it returns the whole index but without structure.