In my previous blog post, I explained SharePoint Content types. Taking that one step further, let’s now examine SharePoint’s out of the box capability of defining content types on external data in SharePoint. Once the external data is in SharePoint, we can leverage SharePoint’s standard set of functionality, such as defining an out of the box workflow, or the referential relationship between lists, etc.
This is a simple representation of the SharePoint Object Hierarchy. Each of the constituents is described below.
As per MSDN documentation, a content type is a reusable collection of metadata, workflow, behaviour, and other settings for a category of items or documents in a Microsoft SharePoint Foundation 2010 list or document library. Content types enable you to manage the settings for a category of information in a centralized, reusable way.