Is there any way I can extend the search or filter module with my custom tags or how do I create Global tags that i can access inside the searchtemplate and filtertemplate in dw 7.2?
There are no any specific notifications/extenders for the search (or filter) templates but you can just use the general Dynamicweb.Standard.Page.AfterOutput notification to render you custom tags. Of course in this case you don't have a "context" of the specified filter so if you think that it might be a good idea to have something like SearchFilterTemplateExtender then we'll consider implementing it.
