Sub collections (Hierarchical structure, sorry, stupid question)

Hi,

Im new to Omeka and loving it so far.

Sorry if this is a stupid question but is there any way to create collections in a hierarchical fashion?

i.e.

Collection1
->1900-1910
->1900
->January
->February
->March
->etc
->1901
->January
->February
->March
->etc
->1902
->January
->February
->March
->etc etc etc.

->1910-1920
->1911
->January
->February
->March
->etc
->1912
->January
->February
->March
->etc
->1913
->January
->February
->March
->etc etc etc.

Collection2
->1900-1910
->1900
->January
->February
->March
->etc
->1901
->January
->February
->March
->etc
->1902
->January
->February
->March
->etc etc etc.

->1910-1920
->1911
->January
->February
->March
->etc
->1912
->January
->February
->March
->etc
->1913
->January
->February
->March
->etc etc etc.

I.e. I suppose what I want to do is nest the collections in a hierarchical fashion.

Hope you understand the question, is there a way to do this or achieve the same?

Thanks very much for any replies.

Sorry, the extra spaces were lost when posting but I hope you will get the idea from the diagram!

That is not possible with Omeka collections. What is the overall goal of nesting items by date? There is a date field for each item, so that everything is searchable by the date. If you want additional interpretative content per year or era as you've defined the exhibit builder might work.

Thanks very much for the reply Sheila.

The reason for the hierarchical structure is mainly to add browsability. We plan to add around 5000 images, probably 3-5 per item so there were only a few items per collection we could have quite a few collections listed on the page and therefore have to scroll through a long list of all the collections (one per year for 230 years for instance).

We could of course use exhibits but obviously this would limit us to 16 objects which may not fit some of the structured data. Its a shame you cant add a collection to an exhibit, otherwise that would give us effectively a 3 layer structure.

I was just wondering how other people have managed there data or have they all used a two layer system, i.e 3-5 images per item, then add each item to a collection giving quite a few collections?