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# 13.3. Document Variables

## Purpose

These variables are related to the document SDF is currently processing.

## Interface

Name | Type | Purpose
Control: |  |
DOC_TOC | integer | table of contents level
DOC_TWO_SIDES | boolean | build a two-sided document
Book controls: |  |
DOC_LOF | boolean | build a list of figures
DOC_LOT | boolean | build a list of tables
DOC_IX | boolean | build an index
Information: |  |
DOC_PATH | string | the full pathname of the current document
DOC_DIR | string | the directory of the current document
DOC_BASE | string | the base (filename) of the current document
DOC_EXT | string | the extension of the current document
DOC_SHORT | string | the base and extension of the current document
DOC_START | datetime | the time document conversion started
DOC_MODIFIED | datetime | the most recent modification time of files visited so far