# ASN.1 module SSEM-PDU-Descriptions
OID: _{ itu-t (0) identified-organization (4) etsi (0) itsDomain (5) wg1 (1) ts103301 (103301) ssem (4) version2 (2) }_
draft 001 of the SSEM-PDU-Descriptions module for TS 103 831 V2.2.1 integrating:
initial revision based on ASN.1 files of [ISO TS 19091] and [SAE J2735]
## Imports:
* **[ETSI-ITS-DSRC](ETSI-ITS-DSRC.md)** *{ itu-t (0) identified-organization (4) etsi (0) itsDomain (5) wg1 (1) ts103301 (103301) dsrc (6) major-version-2 (2) minor-version-1 (1) } WITH SUCCESSORS*
* **[ETSI-ITS-CDD](ETSI-ITS-CDD.md)** *{ itu-t (0) identified-organization (4) etsi (0) itsDomain (5) wg1 (1) 102894 cdd (2) major-version-4 (4) minor-version-1 (1) } WITH SUCCESSORS*
## Data Elements:
### SSEM
Signal status extended Message
This DF includes DEs for the SSEM: protocolVersion, the SSEM message type identifier `messageID` and
the station identifier `stationID` of the originating ITS-S and the signal status data from ETSI-ITS-DSRC.
* _header_ of type [**ItsPduHeader**](ETSI-ITS-CDD.md#ItsPduHeader)
The DE `protocolVersion` is used to select the appropriate protocol decoder at the receiving ITS-S.
It shall be set to 2.
The DE `messageID` shall be ssem(10).
* _ssm_ of type [**SignalStatusMessage**](ETSI-ITS-DSRC.md#SignalStatusMessage)
contains the Signal status data as defined in ETSI-ITS-DSRC.
**Categories:** Basic Information
**Revision:** _V1.3.1_
```asn1
SSEM ::= SEQUENCE {
header ItsPduHeader,
ssm SignalStatusMessage
}
```