# Metadata Auto Mapper Action With the help of the Metadata Auto Mapper Action it is possible to resolve wildcards, which were defined in metadata as default value, in the stream, since otherwise they would appear in the pure form as {wildcard} in the metadata of the respective object. A suitable use case would be the use of a timestamp in a hidden metadata field. --- # 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.helmut.de/helmut4-releases/v4.6.0/helmut4-components/streamdesigner/nodes/actions/misc/metadata-auto-mapper-action.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.