| <refentry xmlns="http://docbook.org/ns/docbook" |
| xmlns:xlink="http://www.w3.org/1999/xlink" |
| xmlns:xi="http://www.w3.org/2001/XInclude" |
| xmlns:src="http://nwalsh.com/xmlns/litprog/fragment" |
| xmlns:xsl="http://www.w3.org/1999/XSL/Transform" |
| version="5.0" xml:id="l10n.lang.value.rfc.compliant"> |
| <refmeta> |
| <refentrytitle>l10n.lang.value.rfc.compliant</refentrytitle> |
| <refmiscinfo class="other" otherclass="datatype">boolean</refmiscinfo> |
| </refmeta> |
| <refnamediv> |
| <refname>l10n.lang.value.rfc.compliant</refname> |
| <refpurpose>Make value of lang attribute RFC compliant?</refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv> |
| <src:fragment xml:id="l10n.lang.value.rfc.compliant.frag"> |
| <xsl:param name="l10n.lang.value.rfc.compliant" select="1"/> |
| </src:fragment> |
| </refsynopsisdiv> |
| |
| <refsection><info><title>Description</title></info> |
| |
| <para>If non-zero, ensure that the values for all <tag class="attribute">lang</tag> attributes in HTML output are RFC |
| compliant<footnote><para>Section 8.1.1, <link xlink:href="http://www.w3.org/TR/REC-html40/struct/dirlang.html#h-8.1.1">Language Codes</link>, in the HTML 4.0 Recommendation states that: |
| |
| <blockquote><para>[RFC1766] defines and explains the language codes |
| that must be used in HTML documents.</para> |
| <para>Briefly, language codes consist of a primary code and a possibly |
| empty series of subcodes: |
| |
| <literallayout class="monospaced">language-code = primary-code ( "-" subcode )*</literallayout> |
| </para> |
| <para>And in RFC 1766, <link xlink:href="http://www.ietf.org/rfc/rfc1766.txt">Tags for the Identification |
| of Languages</link>, the EBNF for "language tag" is given as: |
| |
| <literallayout class="monospaced">Language-Tag = Primary-tag *( "-" Subtag ) |
| Primary-tag = 1*8ALPHA |
| Subtag = 1*8ALPHA</literallayout> |
| </para> |
| </blockquote> |
| </para></footnote>. |
| |
| by taking any underscore characters in any <tag class="attribute">lang</tag> values found in source documents, and |
| replacing them with hyphen characters in output HTML files. For |
| example, <literal>zh_CN</literal> in a source document becomes |
| <literal>zh-CN</literal> in the HTML output form that source. |
| |
| <note> |
| <para>This parameter does not cause any case change in <tag class="attribute">lang</tag> values, because RFC 1766 |
| explicitly states that all "language tags" (as it calls them) "are |
| to be treated as case insensitive".</para> |
| </note> |
| </para> |
| |
| </refsection> |
| </refentry> |