All Section SummaryInfo fields:
TITLE¶TU16, DXF 1
SUBJECT¶TU16, DXF 1
AUTHOR¶TU16, DXF 1
KEYWORDS¶TU16, DXF 1
COMMENTS¶TU16, DXF 1
LASTSAVEDBY¶TU16, DXF 1
REVISIONNUMBER¶TU16, DXF 1
HYPERLINKBASE¶TU16, DXF 1
TDINDWG¶TIMERLL
TDCREATE¶TIMERLL
TDUPDATE¶TIMERLL
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props¶Dwg_SummaryInfo_Property*
unknown1¶RL
unknown2¶RL