The source metadata must be “content”, “url” or any ManifoldCF document field provided by your Repository Connector. The destination metadata must exist in Solr environment (no check done). Depending on your regular expression, several different values may be found in a document, so the metadata receiving the results must be multi-valued, otherwise it will contain the last match found. If the checkbox “Keep only one value” is set to true or if “Value if true” is specified, then only one value will be used. You can define only one regular expression per metadata for this version (as of June 1st, 2023). The regex are only applied to what Tika considers as "content" in the source document, this excludes therefore any document metadata (as of June 1st, 2023).
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