+* Use a non-breaking space (" ") between a number and its unit.
+
+
+5.2 Language
+------------
+
+* The Ardour manual is written in Americal English spelling.
+* Use SI units with standard abbreviations. Give imperial units only as
+ additional information, if at all.
+
+
+5.3 Chapter Headline Capitalization
+------------------------------------
+
+Capitalization follows
+https://developer.gnome.org/hig-book/3.6/design-text-labels.html.en#layout-capitalization
+:
+
+* Capitalize all words in the headline, with the following exceptions:
+ Articles: a, an, the.
+ Conjunctions: and, but, for, not, so, yet ...
+ Prepositions of three or fewer letters: at, for, by, in, to ...
+* Keep headlines short and concise.
+* secondary headlines in articles are not capitalized
+* Do not capitalize concepts in the text body, with the possible exceptions
+ of _the_ Editor and _the_ Mixer.
+