Purpose
Demo ZCL_XTT_DEMO_030 explains nested repetition: a table of root records where every root record can itself contain a detail table. Correct block boundaries are essential because XTT must know exactly which part of the template to copy at each level.
Define the nested data
" Structure of document
BEGIN OF ts_root,
title TYPE string,
bottom TYPE string,
t TYPE tt_rand_data, " Table within another table (lt_root)
END OF ts_root.
DATA:
lt_root TYPE STANDARD TABLE OF ts_root.
...
ro_xtt->merge( is_block = lt_root iv_block_name = 'R' ).
Pass the outer table to MERGE( ) with root name R. For ZCL_XTT_WORD_DOCX and ZCL_XTT_PDF, the root block can span the document; in ZCL_XTT_EXCEL_XML, it spans a worksheet.
Format-specific boundaries
In Word, {R} represents the document-level block, including its trailing page break. {R-T} represents one detail row without the header.
In Excel XML 2003, {R} can identify the worksheet that must be repeated:
After expansion, every TS_ROOT row becomes a separate worksheet.
TITLE is an ordinary structure component, not a reserved XTT keyword.
For PDF output, pass the replicated page name through IV_BLOCK_NAME. To force page breaks inside the document, set the break attribute on the first child subform as shown below.
