Language translation file created by the lupdate utility, which is included with Digia's Qt SDK; contains phrases and their translations into another language; used for storing translations specific to a particular application.
TS files can be converted to .QPH files using the lconvert utility, which is included with the Qt SDK. Unlike TS files, QPH can be used for multiple applications. Both TS and QPH files are stored in an XML format.
NOTE: Qt SDK was previously developed by Nokia before Digia acquired the software.