[xep-support] Nesting indents

[Lori Wong]

I would like to nest indenting for list blocks so that if a list occurs 
within a list, the child list gets indented relative to the previous 
one.  As in,

    - List 1 item 1
    - List 1 item 2
         - List 2 item 1
         - List 2 item 2
            - List 3 item 1
            - List 3 item 2
         - List 2 item 3
    - List 1 item 3

I have tried to use start-indent to do this as follows:
<fo:list-block
    provisional-distance-between-starts="1.15in" text-align="left"
    font-size="12pt" line-height="16pt"
    start-indent="from-parent(start-indent)+.25in"
    provisional-label-separation=".125in"
    space-before.optimum="10pt">

however, XEP generates warnings that look like:
{?Bad attribute start-indent: Cannot add type Word to type Length}
which I assume has to do with trying to add the value 
from-parent(start-indent) with a length value such as the .25in.

If I use a fixed length here, such as the .25in, I do not get the error 
messages.  Similarly, I can just use the 
from-parent(start-indent).  However, in both cases, I do not get the nested 
indenting that I desire.

It may be that I'm attempting to use the from-parent(start-indent) 
incorrectly.  Does anyone have a solution for handling the nested indents 
(where I don't have to put in fixed values for the subsequent levels of 
list blocks)?  My list items tend to span more than one line, so I need to 
specify an indent for the entire block rather than just the first line.

Thanks!

- Lori
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