Lists all IPTC Record 1 (Envelope) DataSet tags.
| IGMDTAG_ID_IPTC_ENV_MODEL_VERSION | Model version. |
| IGMDTAG_ID_IPTC_ENV_DESTINATION | Destination information (additional routing information. |
| IGMDTAG_ID_IPTC_ENV_FILE_FORMAT | File format. |
| IGMDTAG_ID_IPTC_ENV_FILE_FORMAT_VERSION | File format version. |
| IGMDTAG_ID_IPTC_ENV_SERVICE_IDENTIFIER | Service identifier. |
| IGMDTAG_ID_IPTC_ENV_ENVELOPE_NUMBER | Envelope number. |
| IGMDTAG_ID_IPTC_ENV_PRODUCT_ID | Product ID. |
| IGMDTAG_ID_IPTC_ENV_ENVELOPE_PRIORITY | Envelope priority. |
| IGMDTAG_ID_IPTC_ENV_DATE_SENT | Date sent. |
| IGMDTAG_ID_IPTC_ENV_TIME_SENT | Time sent. |
| IGMDTAG_ID_IPTC_ENV_CODED_CHARACTER_SET | Coded character set. |
| IGMDTAG_ID_IPTC_ENV_UNO | Unique Name of Object. |
| IGMDTAG_ID_IPTC_ENV_ARM_IDENTIFIER | ARM identifier. |
| IGMDTAG_ID_IPTC_ENV_ARM_VERSION | ARM version. |