# Descriptive Information Descriptive Information contains the data that serves as the input to documents or applications called **Access Aids**. The Descriptive Information is generally derived from the **Package Description**, which is itself derived from the Content Information and PDI. The Descriptive Information can be viewed as an index to enable efficient access to the associated Information Package via associated Access Aids. **Access Aids** are documents or applications that can be used to locate, analyze, retrieve, or order information from the archive. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.libnova.com/labdrive/data-curation-and-preservation-1/how-to-deal-with-additional-information/descriptive-information.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.