Nit: More direct, closer to the format terms

csaf_2.1/prose/edit/src/conformance.md

@@ -605,7 +605,7 @@ Secondly, the program fulfills the following for all items of:
   > This is done to create a deterministic conversion.
 
   The tool SHOULD implement an option to use the latest available CWE version at the time of the conversion that still matches.
-* `/vulnerabilities[]/disclosure_date`: If a `release_date` was given, the CSAF 2.0 to CSAF 2.1 converter MUST set its value as `disclosure_date`.
+* `/vulnerabilities[]/disclosure_date`: If a `release_date` was given, the CSAF 2.0 to CSAF 2.1 converter MUST convert the key as `disclosure_date`.
 * `/vulnerabilities[]/remediations[]`:
   * The CSAF 2.0 to CSAF 2.1 converter MUST convert any remediation with the category `vendor_fix` into the category `optional_patch`
     if the product in question is in one of the product status groups "Not Affected" or "Fixed" for this vulnerability.