l10n.lang.value.rfc.compliant — Make value of lang attribute RFC compliant?
If non-zero, ensure that the values for all lang
attributes in HTML output are RFC
compliant[2].
by taking any underscore characters in any lang
values found in source documents, and
replacing them with hyphen characters in output HTML files. For
example, zh_CN
in a source document becomes
zh-CN
in the HTML output form that source.
This parameter does not cause any case change in |
[2] Section 8.1.1, Language Codes, in the HTML 4.0 Recommendation states that:
[RFC1766] defines and explains the language codes that must be used in HTML documents.
Briefly, language codes consist of a primary code and a possibly empty series of subcodes:
language-code = primary-code ( "-" subcode )*
And in RFC 1766, Tags for the Identification of Languages, the EBNF for "language tag" is given as:
Language-Tag = Primary-tag *( "-" Subtag ) Primary-tag = 1*8ALPHA Subtag = 1*8ALPHA