For Wikis T1, T2, T1<>T2 with pages t1 in T1, t2 in T2, we define the TwinPage relation as follows:

t1 Twinpages t2 :<=> WikiPageName(t1)=WikiPageName(t2) and BiLinked(t1,t2)


'''Verbose:'''
Two different Wikis are called TwinWikis iff their pages are mapped one-to-one and each mapped pair of pages are namesakes (i.e. share the same WikiPageName).

== BillSeitz's network ==
Bill has his own network of twin pages with an embeddable widget. See:

http://webseitz.fluxent.com/wiki/TwinPages

https://melanocarpa.lesarbr.es/hypha/bill_seitz_twin_pages


'''Discussion:'''

Due to the name-sharing, TwinPages don't need to repeat the name of their complementary twin ("brother/sister page"). Instead of this, they only need to use their WikiPrefix or WikiLogo in a uniform way.
This is an excellent way to promote wikis by continuous name-recognition.

The metapher "twin" implies symmetry in the sense, that "A is a twin to B" is equivalent to "B is a twin to A". 

The terms FriendPage, FriendWikis, PartnerPage, PartnerWikis are also worth to be considered to be formalized/implemented/used  -- FridemarPache

The FriendPage relation is interesting (as a metaphor and a source of inspiration), because it is

* reflexive (each one is their own friend (hopefully))
* symmetric
* transitive ("your friends are my friends" useful at least as mnemonic)


'''Notes:'''

A couple of additional points...

Hi Hans,
* The use of the WikiPragma: "TwinPages:" on the bottom line of the page, immediately followed by a list of wikis with the same Wiki Page Name is Wiki:DoTheSimplestThingThatCouldPossiblyWork . In this way, making TwinPages is userdefined. It's not anymore the privilege of a GodKing to make twins.
* By applying the insights, gained from TwinPagesArchive, the author made the above definition less restricted. 

-- FridemarPache
 
* The CommunityWiki:RecentNearChanges page even makes it easy to review a merged set of RecentChanges.
* Consider too Wiki:SisterSites as a form of automatic linking between wikis. 

-- HansWobbe

Hi Hans, 
* I put your contribution into the redefinition of TwinPage. Thank you. 
* As currently I found no WikiFarm yet, that supports the automatic creation of TwinPages or even TwinWikis/TwinBalls, I am going to use the following workaround in my SlideWiki experiment: For each slide page with name XYZ, I take as TwinPage a page with name XYZ_ . In this way any wiki W can be made a partition of two wikis W1, W2, where all the pagenames in W2 have trailing underscores, whereas all the pages in W1 don't have one. The disadvantage of a manual made TwinWiki pair (W1,W2) is,  that it may be another threshold for newcomers and that it takes a bit more care. But I think, that the advantages for a partitioned SlideWiki outweigh by far this little nuisance.


-- FridemarPache

Now we need a decent term for the Wikis who have TwinPages in common. "Sister" A cannot have a T1, wheras "Sister" B has a T2, where T1,T2 are twin pages. Therefore the autor suggests the term TwinWiki. -- FridemarPache

'''Attention:'''
* The content of the page, that was earlier named TwinPages ''(, now redirected to the current page)'', moved to TwinPagesArchive. Reason: it was asked to be reworked, probably for reason of systematics and usefulness.
* WikiNode is an instance of a TwinPage.
* TwinPages is also used as a WikiPragma.
* CommunityWiki has an implicit TwinPage: i.e it redirects TwinPage as a NearLink to MeatballWiki 
* A powerful generalization of TwinPage is VirtualTwinPage

-- FridemarPache

''New notation:''' After TwinPages we insert the pseudo-icon <=>.
If this usage is established, we can omit the pragma "TwinPages", because the pseudo-icon '<=>' appears to be
sufficiently selfexplaining, if there are enough use-cases.

----
TwinPages: <=> [http://moinmoin.wikiwikiweb.de/TwinPages MoinMoin], [http://c2.com/cgi/wiki?TwinPage WardsWiki],[http://wiki.crao.net/index.php/TwinPage CraoWiki], [http://www.communitywiki.org/en/TwinPage CommunityWiki]
[http://www.wikiservice.at/fractal/wikidev.cgi?TwinPages FractalWiki] [http://www.wikiservice.at/gruender/wiki.cgi?TwinPages GruenderWiki]

Google:TwinPage DiiGo:(1), TrailFire [http://trailfire.com/fridemar/marks/100364]

CategoryInterCommunity