I feel the question is bigger than just projects and categories. I would say how should we work together and how should we give the reader a good reading experience
And isn't the problem at Wikitree that we miss interesting profiles with a lot of text?!?!? My hope is that we get more "writers" on wikitree and that we can easily reuse the knowledge by connecting more profiles to this information...
Below my thoughts today on the subject what tools we have inside Wiki
A) Info that could be used on other profiles you could as said use == Free Space Profiles
A-1) If you would like to also have the text from the Free Space profile in the profile then write {{Space: Quakers story}} ==> the text from the Free space profile Quakers Story will be included
A-2) If you add a title at the top of the Free space page ==> you will have an edit link next to the included Free space profile ==> that you easy edit the included page see video
A-3) To see how the Free spage page is used I add a noinclude section with a Whatlinkshere URL on every Free space page I create ==>
<noinclude>
----
''[http://www.wikitree.com/wiki/Special:Whatlinkshere/Space:Lilla_Dammtorp Inbound links]''
</noinclude>
B) How to connect profile to different information sources?
For me genealogy is finding related information to people and learn more ==> you start with a profile and then starts navigate the information available ==> genealogy is perfect with a product like a wiki that is designed to help people navigate between information sources and hyperread.... BUT we need to add the information in a smart way so it can be "reused" is my opinion....
B-1) Status today inside Wiki use projects - my opinion
People add a project template ==> if you are interested in the subject then you can be part of that project and add your profiles to that project
B-2) Other possibilities god and bad with a wiki - my opinion
As said a wiki is created to make hyperreading easy ==> you have
B-2-1) external links
==> [http://www.cnn.com my text] ==> you just link to something else
+ as a reader I find more interesting information
- we don't use better tools inside a wiki see below...
B-2-2) Inbound links.
Inbound links are created with Categories [[Category:Söderala (X)]] ==> you connect the current profile to a category Söderala (X) with an inbound link
or
[[:Space:Lilla Dammtorp]] ==> an inbound link is created but your profile is not associated with the Free space page as it is with a category.. (that is the main difference between a Category and a Free space page still you can use Whatlinkshere URL)
+ You create good information inside Wikitree that can be reused...
+ You connect profiles that are related to an information source ==> can give additional value
+ Using Categories ==> you get all the links at the top of the profile that sometimes makes it easier for the reader to find the related information....
+ Using Categories you also get an information hierarchy ==> easier for other people to navigate
- there is no consensus in Wikitree if hyperreading using categories should be part of Wikitree or not
B-2-3) Inclusion see above A-1 ==> you add the text on one place and include it on many profiles
+ no duplicated info and we reuse
- maybe more complex for editors than cut/paste
B-2-4) Cut/paste all information to all profiles
+ easy for the writer the first time (not when the information should be updated)
+ maybe more complex for the reader.... compared to links and inbound links....
I am right now participating in a training from the University in Basel about reading literature in the digital age and its no easy answer what is best is my feeling but as said a wiki is an excellent tool for genealogy and share/connect information....