Add URI to metadata template element

[michael-conway]

Add a URI to metadata template element.

For example, in DC

Term Name: creator
URI: http://purl.org/dc/elements/1.1/creator
Label: Creator
Definition: An entity primarily responsible for making the resource.
Comment: Examples of a Creator include a person, an organization, or a service. Typically, the name of a Creator should be used to indicate the entity.

Consider 'name' to equate to label and URI maps to URI