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# Qt Linguist Manual: TS File Format

The `.ts` file format used by Qt Linguist is described by the DTD presented below, which we include for your convenience. Be aware that the format may change in future Qt releases.

     <!--
      !
      ! Some notes to the DTD:
      !
      ! The location element is set as optional since it was introduced first in Qt 4.2.
      ! The userdata element is set as optional since it was introduced first in Qt 4.4.
      ! The source and translation elements are optional starting with version 3.0
      ! (Qt 4.6) to support S60 blank messages.
      !
       -->
     <!--
      ! Macro used in order to escape byte entities not allowed in an xml document
      ! for instance, only #x9, #xA and #xD are allowed characters below #x20.
      -->
     <!ENTITY % evilstring '(#PCDATA | byte)*' >
     <!ELEMENT byte EMPTY>
     <!-- value contains decimal (e.g. 1000) or hex (e.g. x3e8) unicode encoding of one char -->
     <!ATTLIST byte
               value CDATA #REQUIRED>
     <!--
      ! This element wildcard is no valid DTD. No better solution available.
      ! extra elements may appear in TS and message elements. Each element may appear
      ! only once within each scope. The contents are preserved verbatim; any
      ! attributes are dropped. Currently recognized extra tags include:
      !   extra-po-msgid_plural, extra-po-old_msgid_plural
      !   extra-po-flags (comma-space separated list)
      !   extra-loc-layout_id
      !   extra-loc-feature
      !   extra-loc-blank
       -->
     <!ELEMENT extra-* %evilstring; >
     <!ELEMENT TS (defaultcodec?, extra-**, (context|message)+) >
     <!ATTLIST TS
               version CDATA #IMPLIED
               sourcelanguage CDATA #IMPLIED
               language CDATA #IMPLIED>
     <!-- The encoding to use in the .qm file by default. Default is ISO-8859-1. -->
     <!ELEMENT defaultcodec (#PCDATA) >
     <!ELEMENT context (name?, comment?, (context|message)+) >
     <!ATTLIST context
               encoding CDATA #IMPLIED>
     <!ELEMENT name %evilstring; >
     <!-- If "no", then the context nesting is for informational puposes only -->
     <!ATTLIST name
               nest (yes|no) "yes">
     <!-- This is "disambiguation" in the (new) API, or "msgctxt" in gettext speak -->
     <!ELEMENT comment %evilstring; >
     <!-- Previous content of comment (result of merge) -->
     <!ELEMENT oldcomment %evilstring; >
     <!-- The real comment (added by developer/designer) -->
     <!ELEMENT extracomment %evilstring; >
     <!-- Comment added by translator -->
     <!ELEMENT translatorcomment %evilstring; >
     <!ELEMENT message (location*, source?, oldsource?, comment?, oldcomment?, extracomment?, translatorcomment?, translation?, userdata?, extra-**) >
     <!--
      ! If utf8 is true, the defaultcodec is overridden and the message is encoded
      ! in UTF-8 in the .qm file.
       -->
     <!ATTLIST message
               id CDATA #IMPLIED
               utf8 (true|false) "false"
               numerus (yes|no) "no">
     <!ELEMENT location EMPTY>
     <!--
      ! If the line is omitted, the location specifies only a file.
      !
      ! location supports relative specifications as well. Line numbers are
      ! relative (explicitly positive or negative) to the last reference to a
      ! given filename; each file starts with current line 0. If the filename
      ! is omitted, the "current" one is used. For the 1st location in a message,
      ! "current" is the filename used for the 1st location of the previous message.
      ! For subsequent locations, it is the filename used for the previous location.
      ! A single .ts file has either all absolute or all relative locations.
       -->
     <!ATTLIST location
               filename CDATA #IMPLIED
               line CDATA #IMPLIED>
     <!ELEMENT source %evilstring;>
     <!-- Previous content of source (result of merge) -->
     <!ELEMENT oldsource %evilstring;>
     <!--
      ! The following should really say one evilstring macro or several
      ! numerusform or lengthvariant elements, but the DTD can't express this.
       -->
     <!ELEMENT translation (#PCDATA|byte|numerusform|lengthvariant)* >
     <!--
      ! If no type is set, the message is "finished".
      ! Length variants must be ordered by falling display length.
      ! variants may not be yes if the message has numerus yes.
       -->
     <!ATTLIST translation
               type (unfinished|obsolete) #IMPLIED
               variants (yes|no) "no">
     <!-- Deprecated. Use extra-* -->
     <!ELEMENT userdata (#PCDATA)* >
     <!--
      ! The following should really say one evilstring macro or several
      ! lengthvariant elements, but the DTD can't express this.
      ! Length variants must be ordered by falling display length.
       -->
     <!ELEMENT numerusform (#PCDATA|byte|lengthvariant)* >
     <!ATTLIST numerusform
               variants (yes|no) "no">
     <!ELEMENT lengthvariant %evilstring; >

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