Is there an out of the box function or way to create a service /
listener that will let another service know that a new version of a
fragment or page has been updated or published? If not what would be the
best way to approach/expose this? Scenario - I have a collection of
documents in an AEM repository. If a document within that repository is
updated (published or created) the other system will then kick off a
process based on the change.