This is specified in the spec, for example here :
http://www.biblioscape.com/rtf15_spec.htm#Heading2
« The delimiter marks the end of an RTF control word, and can be one of the following : [...]
* A digit or a hyphen (-), which indicates that a numeric parameter follows. The subsequent digital sequence is then delimited by a space or any character other than a letter or a digit. »
* add stacked bar and column charts
* add chart colors feature
* adding preliminary chart axis title functionality to XMLwriter
* added percent_stacked to available types array
* Make tick mark and tick label positions configurable
* scrutinizer fixes
* update changelog
* Allow to set "autoHyphenation" for document
* Allow to set "consecutiveHyphenLimit" for document
* Allow to set "hyphenationZone" for document
* Allow to set "doNotHyphenateCaps" for document
* Allow to set "suppressAutoHyphens" for paragraph
* randomize the tempDir more
* Word2007 parsing title formatting (#1297)
* Improve Title parsing
- Title should be able to contain TextRun
- Style 'Title' should be treated the same with as Heading
- Add tests for Heading/Title reader
* update the documentation and the changelog
* PHP 7.2 build should not fail anymore
* fix parsing of footnotes and endnotes
* add method to remove an element from a section
* add method to allow sorting of sections
* Added support for Vertically Raised or Lowered Text (w:position). Note that only docx writing is implemented for now.
* Add tests + changelog
* add reader + tests + doc
* Improve Title parsing
- Title should be able to contain TextRun
- Style 'Title' should be treated the same with as Heading
- Add tests for Heading/Title reader
* update the documentation and the changelog
* PHP 7.2 build should not fail anymore
* reduce dependencies versions
* fix parsing of footnotes and endnotes
* add method to remove an element from a section
Maxim
troosan
Daniel Morris
Samuel BF
Alex Morozov
Ralph02
Maxim Bulygin
Abubakkar Rangara
Humberto Pereira
Tom-Magill
smaug1985
JAEK-S
Frank Liepert
Henri MEDOT
Lenz Weber