This would be mitigated of course by the creation of sub-TW5 files which are as subject-specific as feasible. But, at the cost of Search and the risk of missing some key data where one has forgotten into which Subject-ified TW5 file contains the data. (The reason for the desired "Mothership" Core DB.)
To support new users I was looking and an alternative standard edition people could down load that was more user friendly for new users. I wanted to keep it lite bu knew users may want to search for widget and macro information.
So on tiddlywiki.com I generated a list of key tiddlers widgets, filters, macros etc... As a link to tiddlywiki.com and with descriptions. I intend to add this tiddler to the standard edition so that most searches for something in the standard edition for content on tiddlywiki.com will have a link presented to the user.
This makes me wonder if we could create a standard method to capture tiddler titles, description and keywords from any wiki in a single tiddler in a standard location in any wiki which can be imported from as needed in any otherwiki to add searchability for external content. This could even be done with a template.
In future this could use optimisation techniques to reduce the size of this search content file. And provide an update link.
Regards
Tony