To ensure the precise description of new ELN areas implemented through methods and to enhance the reusability of the data outside the ELN environment, individual input fields and component areas can be completed with terminologies from ontologies (Figure ). Two principal approaches have been implemented: On the Datasets Level: The developed components must be defined using terms from an appropriate methods ontology. This allows for a clear description of the implemented procedures and provides a systematic delivery of the correct metadata forms based on the analytical measurement methods performed within the ELN environment. For All Levels (Datasets, Segments, and Elements): The assignment of an unlimited number of terms from any vocabularies and ontologies available through the TIB's terminology service 22 is supported. Since the application areas and thus the required terms can vary widely, the system does not impose restrictions on the choice of terms. When a term is present in multiple terminologies, the creator of an ELN component is responsible for selecting the appropriate description. After the assignment of a term, the input field combines information on the meaning of the field type with the select options for the "type of sample preparation" (b, left). If information on the meaning is required, the direct link to the ontology service gives more details and a clear definition (b, right).