BWF MetaEdit was developed by the Federal Agencies Digitization Guidelines Initiative (FADGI) supported by AudioVisual Preservation Solutions. BWF MetaEdit permits embedding, validating, and exporting of metadata in Broadcast WAVE Format (BWF) files.
For something named "Broadcast Wave File Editor", it seems not to support AES-46 Broadcast Cart Chunk data. List's it in the "UnsupportedChunk" column with no usable information. <sigh>