CHAPTER 10
878
Document Interchange
The example also illustrates the structure of a parent tree (object 400) that maps
content items back to their parent structure elements and an ID tree (object 403)
that maps element identifiers to the structure elements they denote.
Example 10.15
1 0 obj
<< /Type /Catalog
/Pages 100 0 R
/StructTreeRoot 300 0 R
>>
endobj
100 0 obj
<< /Type /Pages
/Kids [ 101 1 R
102 0 R
]
/Count 2
>>
endobj
% Document catalog
% Page tree
% Structure tree root
% Page tree
% First page object
% Second page object
% Page count
101 1 obj
% First page object
<< /Type /Page
/Parent 100 0 R
% Parent is the page tree
/Resources << /Font << /F1 6 0 R % Font resources
/F12 7 0 R
>>
/ProcSet [ /PDF /Text ] % Procedure sets
>>
/MediaBox [ 0 0 612 792 ]
% Media box
/Contents 201 0 R
% Content stream
/StructParents 0
% Parent tree key
>>
endobj
201 0 obj
<< /Length … >>
stream
1 1 1 rg
0 0 612 792 re f
BT
% Content stream for first page
% Start of text object