Most countries apply complex copyright legislation to content. Simply uploading data on the web does not give permission for other conservators to use it in their work and share again. Choosing one of the licenses proposed in the Linked Conservation Data project means that contributors declare that they are happy for colleagues to use their data and share. The proposed license are Creative Commons zero / Public Domain and Creative Commons Attribution. The benefits of Linked Data are maximised when data is open, i.e. without any of the default restrictions for use, hence we talk about Linked Open Data.