Working with hidden content types and site columns in SharePoint v3

This isn’t new but I’m reproducing for my own benefit!

I blogged ages ago about needing to get at the Event content type in SharePoint which by default is in the _Hidden category

I normally get at the Event content type by creating a calendar, enabling content types and then following the links until I uncover the content type

Today I needed to use a Wiki Page as a content type but my usual method didn’t work as you aren’t able to manage content types in a wiki library

When editing a content type your URL will look something like this (I’m doing this on a SBS 2008 SharePoint setup)

http://companyweb/_layouts/ManageContentType.aspx?ctype=0×0102

The ctype parameter identifies the content type (in this case the Event type)

All I needed to do then was find the ID for the wiki page content type and a quick google search made this the easy part

There were a ton of pages with this information but i used this one as it also provided them in a useful CSV and XLS format (thanks!)

The table below shows all the items in the _Hidden group. The full list is on the post i mentioned but I’m only interested in the hidden ones as i can get at the rest via the UI

*(these lists also include types for MOSS)

There is also another post showing hidden Site Columns (here) which also has the spreadsheet formats (though i couldn’t get the page to open while i was writing this and ended up using Google’s cache of the page)

Once I’d changed the group of the wiki page content type i then created a new wiki page content type that inherited from the original to create my own base wiki type (as I don’t think you should mess with the built-in types!)

I was able to use the wiki content type in regular a document library so i could mix wiki pages with regular documents (which was the whole point of the exercise!)