Comments and favors on YAML 1.2 spec 2009-07-21

Dear the YAML spec writers,

The rest are less important comments or favors regarding to 
the YAML 1.2 spec dated 2009-07-21.

1. Omission of line break at the end of YAML stream

While the spec allows the omission of the final comment line 
break (Sect. 6.6), it does not allow the omission of the final 
line break in a plain / literal / folded style text. 
Consequently, YAML stream "abc" can not be accepted by the 
YAML parser while "abc\n" can. If this is intended, please 
clarify it in the text. 

Otherwise, adding /* End of File */ in the b-chomped-last 
rule seems to allow such an input safely. I feel this is more 
human friendly.


2. Distinguish non-content white spaces from as-space white spaces

The BNF syntax distinguishes whether a line break is non-content, 
as-space or as-line-feed. But it does not distinguish whether 
a white space is non-content or as-space. 

I felt it is helpful to distinguish it in the BNF rules.


3. Form feed (#x0C) in YAML 1.2 stream

There is a note that "YAML 1.2 processors parsing a version 
1.1 document should therefore treat these line breaks as non-break 
characters, with an appropriate warning" in Sect. 5.4. But it 
seems that the form feed (#x0C), which was a line break in YAML 1.1,
is not allowed anywhere in a YAML 1.2 stream. 
If so, please add some comment on this issue.


Thanks for taking time to think of my posts.

Osamu Takeuchi


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