Section headers inconsistent

"Section headers are inconsistently formated:

3.3.1 Bool Encodings
3.3.2 Int Encodings

compare:

4.1.1 Bool encoding
4.1.2 Int encoding

If you prefer the APA style, follow: http://blog.apastyle.org/apastyle/headings/

Or MLA:

• • • • • 
          Heading Caps. Each word in a title is capitalized, except for articles (a, an, the), prepositions (against, between, in, of, to), conjunctions (and, but, for, nor, or, so, yet), and the infinitive to. This form of capitalization is used for headings and subheadings in many styles, and traditionally in newspapers where the term originated.

In any case, be consistent.

BTW, there is no reason to abbreviate Boolean or Integer or Str in this specification. Particularly in light of longer section titles written out in full. Spell out words in section titles."