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This is a pluggable component in the Fedora framework that is responsible for authorizing all actions take on resources.
Predicate
..A predicate expresses a relationship between the subject and the object of a triple.
Prefix
Typically a short string representation of an associated namespace. For example the prefix "dc" could be used to represent the namespace "http://purl.org/dc/elements/1.1/". If we wanted to access an element (e.g. "contributor") within that namespace we could do it with the prefix "dc:contributor" or in the full form "http://purl.org/dc/elements/1.1/contributor".
Prefixes are limited to the following grammar:
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A transaction represents a series of changes to the repository that must execute successfully and completely or not at all. Transactions should be used to ensure consistency. Each transaction succeeds or fails as a complete unit; it cannot remain in an intermediate state.
Triple
A triple is a fundamental building block of RDF. It consists of: a subject, predicate, and an object. In this way, a triple can describe a relationship (via the predicate) of the subject to the object. The official definition can be found here.
Uniform resource identifier (URI)
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