Mat, There has being "a lot of water under the bridge", in this conversation and it is now a little hard to identify the current state of play. I always intended to contribute but have being very busy, Can I suggest a few points, some random some systematic and you can see how they fit into the the final result?
TiddlyDesktop Claims it can serve on the network although I have not seen the settings or instructions yet. It servers single Files, Node JS and Provides a browser (NW?). and has the index wiki. If in fact all these advertised features are available in TidlyDesktop and it helps us identify the components we need to address in your wonderful table. I have raised this previously but all tiddlywikis use a browser, be it one of the common ones, or one built into the solution like TiddlyDesktop, "AndTWiki" *Here is a brain dump of what I know about all the different alternatives, and the rules arising, I have studied.* 1. All tiddlywikis use a browser, be it one of the common ones, or one built into the solution 2. In a browser there are two ways to access a tiddlywiki be it an http:// address or a file:// address 3. If they(wikis) are accessed at a http address there is a server somewhere, servers "replace the* need* for a file saver", but you can still save as a file. 4. If they(wikis) are accessed at a file:// address there needs to be a "file saver in the browser" or a tiddler Database *but only if the default download mechanism is undesirable (it often is)* 5. TiddlyDesktop comes with its own browser AND can serve files AND provide a filesaver to TiddlyWikis opened in it. 6. All ? Servers can serve on the local only address, or on the network using the physical servers IP Address (which allows other devices on the network to access the server, and any wikis it hosts) 7. Some servers can serve folder based wikis and others can also serve single file wikis 8. All ? TiddlyWikis can save file or folder wikis as file based wikis 9. All ? TiddlyWikis (including served folder base wikis) can Import tiddlers from file wikis or intermediate bundles of tiddlers (eg JSON files) 10. *Most *servers are based on NodeJS installed or packaged in the server implimentation 11. NoteSelf is not a Server, but it can use CouchDB and Pouch DB to Server tiddlers, a wonderful feature is the CounchDB (I think of as being in my loungeroom) is inside your browser session but only serves tiddlers to that browser session so it emulates a file saver (but it does not update the original tiddlywikifile or HTML hosted "file") 12. NoteSelf allows you to "Host" tiddlywikis as plane HTML files anywhere with updates to that html file saved in CounchDB or PouchDB, Since PouchDB is outside the browser you can access the tiddlers it serves by logging in with a NoteSelf File tiddlywiki, or HTML hosted tiddlywiki. In this case we have two tiddler based database servers on local (browser session only) "CoundDB and a Remote tiddler based database server (pouchDB) There seems to be a clear distinction between File based wikis and Folder Based Wikis (typical hosted in NodeJS but I expect an increase in Databases of Tiddlers "database hosted wikis" as with PouchDB. I would like to see one based on MySQL as an example. File based wikis Folder Based Wikis Database hosted wikis - Database Inbrowser - External database (Local or remote) Regardless of the above how do you access your database? Within a provided Browser (addressing handled internally) At a File:// Address At an http:// address Local Remote For Example (the difficult cases?) *Bob* is a server, has an "index wiki", Serves Folder based wikis, not file based wikis, does not have its own Browser, removes the need for a saver, can send Operating Systems Messages to the Physical server it is installed on, can be accesses localy and remotely, and can cope with multiple access to the same wiki. *TiddlyServer* is a server, has an "index (but no index Wiki)", Serves File and Folder based wikis, does not have its own Browser, removes the need for a saver, , can be accesses localy and remotely, however multiple access to the same wiki could result in "contention". A final note: File based wikis can typically be *opened in any browser, and be saved with any browser* (this is often forgotten), However FileBased wikis require a file saver to *bypass the default Download method*, usually one for the given browser in which it is running, Since browser security has increased there are limitations to how file savers can operate (eg; Under the browsers download folder, though not always true) Depending on the server, File and Folder based wikis that are served can be accessed via a local or remote IP address and since the server handles the save mechanism no file save is required meaning "Served" wikis can be accessed with virtually any browser (although results may differ). The above statements are 100% correct to my understanding, Please consider this in deciding on columns, and feel free to extract some text as explainers (tooltips perhaps), if someone had told me these things when I first started with TiddlyWiki I would have saved a lot of time. 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