Dealing with annotation versioning through multiple versioning policies and management thereof

Methods, systems, and articles of manufacture for maintaining annotations for changing source documents are provided. For some embodiments, an annotation system may support multiple policies, with each policy dictating how (or if) an annotation created for a version of a source document should be applied to subsequent versions of the source document. For some embodiments, a user creating an annotation may select from a group of available policies to be applied to the annotation.