Fix readme of V2.3.1

# Abstract syntax notation module for ETSI TS 103 301 Release 2

These modules are published as a part of delivery **ETSI TS 103 301 v2.2.2**

These modules are published as a part of delivery **ETSI TS 103 301 v2.3.1**

## License

* The **[ETSI-ITS-CDD](https://forge.etsi.org/rep/ITS/asn1/cdd_ts102894_2)** module from **ETSI TS 102 894-2**: "Intelligent Transport Systems (ITS); Users and applications requirements; Part 2: Applications and facilities layer common data dictionary".

* The **[IVI](https://standards.iso.org/iso/ts/19321/ed-3/en/)** module from **CEN ISO/TS 19321**: "Intelligent transport systems - Cooperative ITS - Dictionary of in-vehicle information (IVI) data structures".

## Syntax check

## History

The correctness of these ASN.1 files can be verified using the bash script **syntax_check.sh**

Release V2.3.1 integrates:

- SREM: `RequestorDescription` gets a new OPTIONAL `serviceProviderId` (DF `Provider` from CDD) for authorization

- SREM: the `ocit` extension in `RequestorDescription` is now OPTIONAL

See the notes in this script for further details. Output of current run:

Release V2.2.2 integrates:

- Editorial only, no ASN.1 syntax changes

- DSRC modules: "draft" headers removed

- DSRC.asn comments: markdown formatting fixed and typos corrected (e.g. "PAT" -> "SPAT")

```

file IVIM-PDU-Descriptions.asn

  process IVIM-PDU-Descriptions-0-4-0-5-1-103301-2-2-1

    found IVI-1-0-19321-3-WS - enqueue successor

    found ETSI-ITS-CDD-0-4-0-5-1-102894-2-4-WS - enqueue successor

file cdd/ETSI-ITS-CDD.asn

  process ETSI-ITS-CDD-0-4-0-5-1-102894-2-4-2

  remove successor

file DSRC.asn

  process ETSI-ITS-DSRC-0-4-0-5-1-103301-6-2-1

    found ETSI-ITS-CDD-0-4-0-5-1-102894-2-4-WS - successor exist

    found ETSI-ITS-DSRC-REGION-0-4-0-5-1-103301-6-1-2-WS - enqueue successor

file DSRC-addgrp-C.asn

  process ETSI-ITS-DSRC-AddGrpC-0-4-0-5-1-103301-6-0-2-1

    found ETSI-ITS-DSRC-0-4-0-5-1-103301-6-2-1 - already exist

    found ETSI-ITS-CDD-0-4-0-5-1-102894-2-4-WS - successor exist

file DSRC-region.asn

  process ETSI-ITS-DSRC-REGION-0-4-0-5-1-103301-6-1-2-1

  remove successor

    found ETSI-ITS-DSRC-0-4-0-5-1-103301-6-2-1 - already exist

    found ETSI-ITS-DSRC-AddGrpC-0-4-0-5-1-103301-6-0-2-1 - already exist

file .external/IVI-1-0-19321-3-WS.asn

  process IVI-1-0-19321-3-1

    found ETSI-ITS-CDD-0-4-0-5-1-102894-2-4-WS - successor exist

    found EfcDataDictionary-1-0-17573-3-1-WS - enqueue successor

    found GddVersion1-1-0-14823-1-1-WS - enqueue successor

    found IVI-IS - enqueue

file .external/EfcDataDictionary-1-0-17573-3-1-WS.asn

  process EfcDataDictionary-1-0-17573-3-1-3

file .external/GddVersion1-1-0-14823-1-1-WS.asn

  process GddVersion1-1-0-14823-1-1-1

file .external/IVI-IS.asn

  process IVI-IS

    found IVI-1-0-19321-3-1 - already exist

++++++++++++++++++++++++

+++ SUCCESS

+++ All modules compiled

a5a97244c826797fc7dab4cf506a04fd1ec6a6369c31a9315b4d6ee5a4146da5  DSRC-addgrp-C.asn

55b2592f630a0104a2d03db7faebd387c50a4345471969585faafa621b67c55a  DSRC-region.asn

45ec89805ba1ae7133c025811c287037d9a2131e6ba513261e5a4b8bb5cdf34c  DSRC.asn

a8a4ea41c05554ccc414284c9f0336fa1d2e631aa5bc3516f67fb6b6c6df5d87  IVIM-PDU-Descriptions.asn

b5c0d28ae238d905bd2d0b54b74291ea9fbf5d4093ddf27b367ac4a99fe8f040  MAPEM-PDU-Descriptions.asn

0786da745470771b599f9dead7b7141f16aead2e73c1234c6804b652264feac2  RTCMEM-PDU-Descriptions.asn

f41b051f9703e16d80fd45cec47b5359fd257a071cca4e18f2795b473ad5a144  SPATEM-PDU-Descriptions.asn

8381a329ed5259679bacc1919b8de16976d057828217d04a10a3b6946aa59596  SREM-PDU-Descriptions.asn

9b71acfcd8d193892da1f9bc9e3e238269366d030ac11fcaf48cfd0b9b230658  SSEM-PDU-Descriptions.asn

++++++++++++++++++++++++

```

Release V2.2.1 integrates:

- New ETSI-owned DSRC modules (`ETSI-ITS-DSRC`, `ETSI-ITS-DSRC-REGION`, `ETSI-ITS-DSRC-AddGrpC`), taken over from ISO TS 19091 and aligned with SAE J2735; the ISO originals are kept under `reference/`

- MAPEM/SPATEM/SREM/SSEM/RTCMEM import `ETSI-ITS-DSRC` instead of ISO 19091 `DSRC`

- All PDU modules import `ETSI-ITS-CDD` (major-version-4) instead of `ITS-Container`, using `WITH SUCCESSORS`

- IVIM imports IVI from ISO TS 19321 ed.3 (major-version-3)

- Module OIDs moved to the `major-version-2 minor-version-1` scheme

- SREM: OCIT extension added to `RequestorDescription` (legacy R09 data)