This module is part of the Apache Sling project.
OSGi DS 1.4 component property type annotations for Sling Resource Observation API.
They ease implementing org.apache.sling.api.resource.observation.ResourceChangeListener services.
The annotations are documented on the following Apache Sling website page: https://sling.apache.org/documentation/the-sling-engine/resources.html#resource-observation.