XML tags

What tag in the xml-file should I use to set the length of a movie?
In old nfo-files for Kodi it was 122min , but what should I use for the xml-files? The sample provided at https://cloud.firecore.com/sample.xml does not provide any runtime-tag.

I need to know because I need this info.

Setting the length tag via XML is not required as Infuse will generate this from the video itself.