The Text Encoding initiative is conceived as a standard system designed to let interoperability between different projects working on analogous topics. However, interoperability is sometimes not easy to reach due to the different interpretation of tags made by each project or group. Given the variety of tags, there are several concepts that can be easily identified for many projects, such as <msIdentifier> or <incipit>, which referent is pretty clear and recognizable. There are some other tags, however, which can experience multiple interpretations, limited by the content of the attributes that modify them
