How to get dom object from acrobat pdf

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i following the document "pdf accessibility api reference" , following section "reading pdf files thru dom interface". there mentions including
acrobataccess.h, acrobataccess_i.c , ipddom.h. please let me know can find these files. also, how can dom object start with. if have sample code share, great. tried googling these not successful in getting info.

any towards appreciated.

to access dom interface, need contact adobe developer support. pddom apis available on case-by-case basis purposes of screen readers.

can explain planning use them for?


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