Iterator returns the iterator to fetch all artifacts with query.

NewAbstractor creates a new abstractor.

NewController creates an instance of the default artifact controller.

Ctl is a global artifact controller instance.

ErrBreak error to break walk.

ErrSkip error to skip walk the children of the artifact.

AdditionLink is a link via that the addition can be fetched.

Artifact is the overall view of artifact.

Option is used to specify the properties returned when listing/getting artifacts.

Abstractor abstracts the metadata of artifact.

Controller defines the operations related with artifacts and tags.