Managed metadata is a hierarchical group of enterprise-wide or centrally managed terms that you can first define and then use in columns in content types or lists and libraries. Managed Metadata is a new type of column in SharePoint 2010 that you can use to assign metadata to an item. SharePoint 2010 uses three terms to refer to managed metadata:
- Managed terms. Think of managed terms as
the controlled vocabulary that
you'll use to assign metadata
to content across your solution.
Not all metadata values need
to be stored and managed as
a managed term. Following are
some good candidates for managed
- Metadata with valid values that can or should be organized hierarchically
- Metadata that's likely to be used in multiple lists and libraries across your solution
- Metadata consisting of a restricted list of values from which users can select
- Managed keywords. Words or phrases added by any user to SharePoint 2010 itemseither formally in a managed term store, or informally as social tagsare managed keywords. Note that managed terms can be organized hierarchically, but managed keywords are all stored in a flat term set called the Keyword Set.
- Term store. The term store is the SharePoint database used to store both managed terms and managed keywords.
For example, your list of product names is a good candidate for a managed term. Sharing a restricted list of product names across the enterprise ensures that all users will assign the same spelling and name for each product. New products can be added in one place and be available immediately across your entire solution.
Managed metadata is "consumed" in a managed metadata service. You must have at least one managed metadata service in order to share content types and managed terms across more than one site collection.