There hasn’t been much work on macros in the MediaWiki filter indeed, only a few of them are really converted to XWiki equivalents right now. Would also be nice to work on a macro converter extension point like I did in the Conflence one or the one Dokuwiki filter has. Now on XWiki side macros are extension points which can easily be implemented (see https://www.xwiki.org/xwiki/bin/view/Documentation/DevGuide/Tutorials/WritingMacros/) even an empty one to just not get any missing macro error but keep them in case you want to implement it later.
If there is mediawiki macros you really want to just skip I guess we could add some list property in the input filter. You seems to want to boolean property to skip all the macros with an id that does not exist in XWiki but that might be a bit dangerous (loosing information). In any case don’t hesitate to create a NEW FEATURE issue on https://jira.xwiki.org/browse/MEDIAWIKI and explain what you would like to see.
Yeah need spend time on it.
In the XWiki world using an URL (if that’s what you mean by “absolute link”) to lead to another page in the same wiki is a very bad practice which is why we tried hard to fix mistakes people often makes in wikis and convert URLs into wiki links when it made sense. What is your rational behind using an URL for this use case ?
Thank @rbr for the explanation. If using level 2 instead of level 1 in MediaWiki is such a common practice I guess we could consider a property to convert x to x-1 heading in the filter. Don’t hesitate to create an IMPROVEMENT issue if you feel it’s needed.
This kind of functionality is kind of always experimental since stuff change all the time on XWiki and MediaWiki sides so converting one into another will always have some gray areas