Metadata in SharePoint 2010

SharePoint 2010 comes with a huge taxonomy API, put into the Microsoft.Taxonomy.dll assembly.

With SP 2010, it is possible to tag items and pages with keywords from a term store, which then can be leveraged through the search solutions, or navigation solutions.

This will provide SharePoint with another method to visualize the data, together with the folder structure (i.e. SPSites, SPWeb, SPList approach).