Github user drigodwin commented on a diff in the pull request:
https://github.com/apache/brooklyn-docs/pull/198#discussion_r123557270
--- Diff: guide/blueprints/catalog/versioning.md ---
@@ -3,18 +3,118 @@ title: Versioning
layout: website-normal
---
-### Versioning
+Brooklyn supports multiple versions of a type to be installed and used at
the same time.
+Versions are a first-class concept and are often prominently displayed in
the UI.
-Version numbers follow the OSGi convention. This can have a major, minor,
micro and qualifier part.
-For example, `1.0`. `1.0.1` or `1.0.1-20150101`.
+In order to do this, Brooklyn requires that the `id:version` string be
unique across the catalog:
+it is normally an error to add a type if a type with the same `id:version`
is present.
+Exceptions are if the definition is identical, or if the `version` is
noted as a `SNAPSHOT`.
--- End diff --
Exceptions are -> The exceptions to this are
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