TFS Sharepoint App - I want a document library column to accept multiple values and... group by?

I'm trying and organizing Official Versions of my solutions and projects within Sharepoint Libraries, and I stumbled across this problem:

There are certain published packages which contain more than one project. I'm currently grouping by a "Project" column I created, but some packages seem to belong in m开发者_StackOverflow中文版ore than one area.

As to say, I want to Split "2011/01 Branch" into 4 website projects. But some packages include more than one website, so I want to see the same file inside every "group".

For instance, I could have a column named Projects with multiple values, so "file_cabbage" would have "Project A", "Project B" and "Project C" as Projects.

So I would have:

Project A:

• file_cabbage

Project B:

• file_cabbage
• file_carrot

Project C:

• file_cabbage
• file_potato

Project D:

• file_carrot
• file_potato

How to accomplish this?

Thanks in advance.

Unfortunately the simple CAML GroupBy doesn't seem to work with choice fields that allow multiple values. The modify list view page only offers you the option to group by a choice field if it is single-valued.

In SharePoint 2010 these views use the XsltListViewWebPart, which gives you sufficient flexibility to produce a list structured in this way provided you are prepared to modify the default XSLT. The downside is that XSLT can be challenging if you are not familiar with it.