{"type": "object", "properties": {"DUID": {"type": "string", "examples": ["W/HOE#2"], "description": "Dispatchable Unit Identifier\nWARNING: This column may contain funny characters such as / (slash) or # (hash). This may break hive-style partitioning.\n"}, "EFFECTIVEDATE": {"type": "string", "examples": ["2026/01/20 00:05:00"], "format": "date-time", "description": "Market date default offer file is effective\nWARNING: Despite what the name suggests, this is a datetime, not a date."}, "VERSIONNO": {"type": "integer", "minimum": 0, "maximum": 65535, "description": "Version no of file for this date"}, "AUTHORISEDBY": {"type": "string", "description": "User authorising record"}, "AUTHORISEDDATE": {"type": "string", "examples": ["2026/01/20 00:05:00"], "format": "date-time", "description": "Date record authorised\nWARNING: Despite what the name suggests, this is a datetime, not a date."}, "FILENAME": {"type": "string", "description": "Load File identifier"}, "LASTCHANGED": {"type": "string", "examples": ["2026/01/20 00:05:00"], "format": "date-time", "description": "Last date and time record changed"}}, "required": ["DUID", "EFFECTIVEDATE", "VERSIONNO"], "description": "DEFAULTOFFERTRK shows the file names of default offers submitted for each unit.\nSource\n\nObsolete; was updated only when participant changed their default bid."}