This category enables you to develop the content of your publication by assigning different descriptors and / or keywords. A keyword is a term which is as short as possible but also precise and complete and describes the factual content of a work. You can enter all your keywords in this field irrespective of the language in question. Separate several keywords by using the space bar; space bar. Note: Classification-based subject indexing (e.g. DDC or RVK and / or specialised classifications) is currently not possible. We are, however, working on this. You can, however, also enter this information in the “Internal note to library staff” field.