0. INTRODUCTION
1. SCOPE
   1. Functional definition
   2. Field of application
   3. Principles
2. REFERENCES
3. TERMS AND DEFINITIONS
   1. Standard terms and definitions
4. MESSAGE DEFINITION
   1. Segment clarification
   2. Segment index (alphabetical sequence by tag)
   3. Message structure
      1. Segment table

This specification provides the definition of the Schedule update - interactive message (SKDUPD) to be used in Electronic Data Interchange (EDI) between trading partners involved in administration, commerce and transport.

A message containing information about travel service schedules. This message is sent by a travel service provider to other service providers or to agencies such as government departments, traffic authorities, and timetable publishing companies.

The Schedule update - interactive message may be used for both national and international applications. It is based on universal practice related to administration, commerce and transport, and is not dependent on the type of business or industry.

• The message is designed to transmit new or changed schedule information in order to update the recipient's system.
• The message can contain either a complete set of schedule information data, either updates to a former delivery.
• The message may also be used to formulate a request for re- transmission of the data in case of error. The message may be sent spontaneously, when the travel service provider has new information available, or as a response to a SKDREQ - Schedule request - interactive message.

See UNTDID, Part 4, Chapter 2.3 UN/ECE UNSM - General Introduction, Section 1.

See UNTDID, Part 4, Chapter 2.3 UN/ECE UNSM - General Introduction, Section 2.

This section should be read in conjunction with the segment table which indicates mandatory, conditional and repeating requirements.

0010 UIH, Interactive message header

A service segment starting and uniquely identifying a message. The message type code for the Schedule update - interactive message is SKDUPD.

Note: Schedule update - interactive messages conforming to this document must contain the following data in segment UIH, composite S306:

0020 MSD, Message action details

A segment to specify the type and business function of the message.

0030 ORG, Originator of request details

A segment to specify details related to the originator of the schedule update.

0040 HDR, Header information

A segment to specify information applicable to the entire message.

0050 IFT, Interactive free text

A segment to provide free text information relating to the entire message.

0060 RFR, Reference

A segment to specify a reference relating to the entire message.

0070 Segment Group 1: ERI-RFR-IFT

A group of segments to specify an error condition.

0080 ERI, Application error information

A segment to specify the type of application error.

0090 RFR, Reference

A segment to reference the erroneus element.

0100 IFT, Interactive free text

A segment to provide text related to the error.

0110 Segment Group 2: PRD-PDT-IFT-TRF-SER-SG3

A group of segments to provide complete service information.

0120 PRD, Product identification

A segment to specify a transport service.

0130 PDT, Product information

A segment to provide detail information about the service.

0140 IFT, Interactive free text

A segment to provide free text information relating to the service.

0150 TRF, Traffic restriction details

A segment identifying restrictions applicable to the service.

0160 SER, Facility information

A segment specifying additional service information.

0170 Segment Group 3: POP-PDT-IFT-TRF-ASD-FRQ-SG4-SG5-SG6-SG8

A group of segments to provide period and frequency information.

0180 POP, Period of operation

A segment to specify a period of operation of the service.

0190 PDT, Product information

A segment to provide detail information about the service.

0200 IFT, Interactive free text

A segment to provide free text information relating to the service.

0210 TRF, Traffic restriction details

A segment identifying restrictions applicable to the service.

0220 ASD, Service details

A segment to provide information about extra services included in the service.

0230 FRQ, Frequency

A segment to specify details about the frequency of the service.

0240 Segment Group 4: SER-ASD

A group of segments to provide additional service information.

0250 SER, Facility information

A segment specifying additional service information.

0260 ASD, Service details

A segment to provide information about extra services included in the service.

0270 Segment Group 5: DTI-IFT

A group of segments specifying days or periods to be included in or excluded from the period of operation of the service.

0280 DTI, Date and time information

To identify a day or period to be included in or excluded from the period of operation of the service.

0290 IFT, Interactive free text

To specify a free text description of the day or period.

0300 Segment Group 6: POR-MES-ASD-SER-TRF-SG7

A group of segments to provide information relating to a location.

0310 POR, Location and/or related time information

A segment specifying a location and the service times related to this location.

0320 MES, Measurements

A segment to specify measurement values relating to the service at the given location.

0330 ASD, Service details

A segment to provide information about extra services included in the service and relating to the location.

0340 SER, Facility information

A segment specifying additional service information relating to the location.

0350 TRF, Traffic restriction details

A segment identifying restrictions applicable to the service at the given location.

0360 Segment Group 7: RFR-RLS-TCE

A group of segments to specify special connection conditions in relation to another service.

0370 RFR, Reference

A segment to specify a reference to another service.

0380 RLS, Relationship

A segment to specify the type of relation.

0390 TCE, Time and certainty

A segment to specify details about the connection conditions to another service.

0400 Segment Group 8: ODI-PDT-IFT-TRF-TFF-ASD-SG9

A group of segments to provide service leg or segment information.

0410 ODI, Origin and destination details

A segment to specify the origin and destination locations of a service leg or segment.

0420 PDT, Product information

A segment to provide detail information about the service leg or segment.

0430 IFT, Interactive free text

A segment to provide free text information relating to the service leg or segment.

0440 TRF, Traffic restriction details

A segment identifying restrictions applicable to the service leg or segment.

0450 TFF, Tariff information

A segment to specify tariff information related to the service leg or segment.

0460 ASD, Service details

A segment to provide information about extra services included in the service.

0470 Segment Group 9: SER-ASD

A group of segments to provide additional service information relating to the service leg or segment.

0480 SER, Facility information

A segment specifying additional service information.

0490 ASD, Service details

A segment to provide information about extra services included in the service.

0500 UIT, Interactive message trailer

A service segment ending a message, giving the total number of segments in the message (including the UIH & UIT) and the control reference number of the message.