1. A method of processing multimedia documents corresponding to parts of a conversation between two or more users, comprising the steps of: individually and locally generating or recording two or more multimedia documents by the two or more users, a first multimedia document of the two or more multimedia documents corresponding to a first part of the conversation corresponding to a first user, and a second multimedia document of the two or more multimedia documents corresponding to a second part of the conversation corresponding to a second user; combining, by a processor, the two or more multimedia documents to a new combined multimedia document; defining at least two segments of the new combined multimedia document; assigning, based on input from the first user, a first type of permission to a first segment of the new combined multimedia document, wherein the first segment of the new combined multimedia document is based on content from the first part of the conversation corresponding to the first user; and assigning, based on input from the second user, a second type of permission to a second segment of the new combined multimedia document, wherein the second segment of the new combined multimedia document is based on content from the second part of the conversation corresponding to the second user; wherein the two or more multimedia documents each comprise time information and the step of combining the two or more multimedia documents is based on time; determining whether to assign a first binary permission to allow processing of at least one segment of the new combined multimedia document; and determining whether to assign a second binary permission to allow processing of at least one of a tag and an annotation; then assigning a plurality of types of permissions to at least one of the segment and the at least one of a tag and an annotation.