[xwiki-devs] What default language for our documents in releases XAR ?

Hi devs, Right now the XAR plugin format goal systematically empty the <defaultLanguage> property. This is wrong IMO since it means we have no idea what is the default document language, it was not too visible before but it's really not very nice for things like the localization module and especially SOLR which store deferently the content depending on the language (stop words, etc). I see several possibilities: 1) We don't touch the XAR maven plugin and we state that when default language is not set, it's en (in the importer for example or in XWikiDocument#getDefaultLanguage) 2) We stop filtering default language in the XAR plugin and we set it to en for all document in which it make sense 3) We force default language to "en" in the XAR plugin WDYT ? I don't like too much 1) since some technical document could really be seen has having no default language, some document without any literal content. But it's more a -0 than a -1, I understand other would want this for simplicity. About 3) as I said having a default language empty is a valid use case IMO so -0 for this one to. Still a bit better than 1) since the use case is still possible. +1 for 2) -- Thomas Mortagne