Source Template Records
Source Template records are identified by this icon:

(similar to a
Source
record icon, but white instead of yellow). Every Source record can
optionally be linked to a single Source Template record. A Source
record that is linked to a Source Template record is called a
templated
Source record. A Source record which is not linked to a
Source Template record is called a
generic Source record.
When you create a new Source record, you will be asked if you want to
create a
generic Source record or a "Source from Template"
(i.e. a templated one). If you opt to create a templated Source
record, you will be required to select the Source Template record.
Templated Source records are designed to hold fields that are appropriate
to their source type. And it is the Source Template record that
specifies what these fields are. To learn more, see
Sources
and Source Templates.