Abstract:
A train control operation system, the system comprising a data collection server for collecting data relating to one or more elements of trains, a network for distributing data relating to the elements to subscribers and a subscription server for hosting definitions of elements which is accessible by subscribers of the system, so as to enable each subscribers to access the definitions from a single source.

Description:
TECHNICAL FIELD 
       [0001]    The present invention relates to a structured means of describing data for use on railway control and safety systems. 
       BACKGROUND 
       [0002]    In order to enable two computers to communicate, both computers must be able to communicate in a common interface language. A common example of such an interface language is the Hyper-Text Mark-up Language (HTML). This is commonly used on web browsers. All modern computers with a web-browser can interpret HTML, but they may not necessarily be able display the data on any particular device due to varying screen sizes and hardware performance limitations. 
         [0003]    For this reason, the Extensible Markup Language (XML) has become more popular than HTML because it allows the data content to be separated from how the data is displayed on a browser. XML is “a meta-language”, meaning that until a data set is defined, the language itself only provides the rules for the creation of a specific mark-up language. 
         [0004]    Another interface language is the Extensible Hyper-Text Mark-up Language (XHTML) which is used for interfacing data to web browsers on smartphones and tablets. The XHTML provides the rules for different devices (having different size and performance characteristics) to adapt webpages for those particular devices. For example, when a web browser on a mobile telephone receives the data it has to render the webpage differently to how it would be rendered on a desktop computer or tablet computer. 
         [0005]    Computer systems also are used to operate railway networks. Those computers may be used to compute many aspects of the operation of the railway. For example, they may be required to track the current location of any particular locomotive or access timetables of where the locomotives should be and when they should be there (to determine whether a locomotive is operating on time). The computer systems operating the railway networks also require an interface language. 
         [0006]    Each computer recipient of the data needs rules on how to interpret that data, so that the information is processed correctly. Multiple computers may need similar but slightly different data. For example, one computer may require time or location to be defined with two decimal points (e.g. 10.12), but another computer may require time and location to be defined with 5 decimals points (e.g. 10.12345). If data is transmitted in a format which a computer cannot interpret, the computer will not be able to process that data and the railway system will not operate. 
         [0007]    Locomotives have many elements that are required by an operator of the railway system. Each of those elements have attributes. The attributes may be fixed or dynamic. Fixed attributes may include, for example, the date on which locomotive was manufactured (e.g. 1 Jan. 2000), whether it has driver cockpits at each end, and the power characteristics of the locomotive. Dynamic attributes may include, for example, the fuel level, oil temperature, speed and location. Those attributes form the content of a message about the locomotive. However, the computer recipient may only be programmed to interpret a subset of the attributes in the message. 
         [0008]    A universal means of interpreting the data for any particular computer railway control system is required. 
         [0009]    The object of the invention is to transmit data for railway computer control systems in one format and have all recipient computing devices interpret that data correctly. 
       SUMMARY OF INVENTION 
       [0010]    According to a first aspect of the present invention, there is a provided a train control operation system, the system comprising:
       (a) a data collection server for collecting data relating to one or more elements of trains;   (b) a network for distributing data relating to the elements to subscribers; and   (c) a subscription server for hosting definitions of elements which is accessible by subscribers to the system, so as to enable subscribers to access the definitions from a single source.       
 
         [0014]    The subscription server and the data collection server can run as separate processes on a single server. The data collection server may represent a number of different servers each collecting different types of data relating to trains. 
         [0015]    According to a second aspect of the present invention, there is a provided a mark-up language for a train control operation system, the system comprising:
       (a) a schema for different data elements relating to trains;   (b) a description of the allowable attributes for each element; and   (c) rules for formatting the attributes of each element.       
 
         [0019]    The schema file may be a well formed XML document. The schema can be hosted on a server which is accessible by subscribers of the system. Preferably, the server is accessible via a web-based Uniform Resource Locator. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0020]    Various embodiments of the invention will be described with reference to the following drawing, in which: 
           [0021]      FIG. 1  is a schematic representation of a railway control system utilising the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0022]      FIG. 1  shows an exemplary railway control system  10  implementing the present invention. The railway control system may be used to track the positions of one or more locomotives, such as locomotives  12  and  14 . The locomotives  12  and  14  may be fitted with GPS tracking devices (not shown). In this exemplary embodiment of the system, GPS Satellites  16  transmit a signal to the GPS tracking device which then relays the location data of the locomotives to either the receiving satellite  18 , or a GSM-R antenna tower  20  or a public mobile 3G antenna tower  22 , for example. The antenna towers  20  and  22  then relay the information to a first position collection server  24 . 
         [0023]    The server  24  may be located in a control centre operated in one state (e.g. New South Wales), for instance. The data relating to the position of the locomotives  12  and  14  can then be relayed to an adjacent operator  26 , who may be in a different location or indeed state (e.g. Queensland), for instance. Both operators may need to exchange data about the location of their locomotives (which may cross each other&#39;s borders), so as to avoid collisions. There could be hundreds of computers connected in a network operating the railway control system. 
         [0024]    Each of those computers may need to display different data about each of the locomotives. For example, screen  28  in  FIG. 1  shows data for a timetable tracking system, screen  30  shows location tracking data (e.g. in a similar manner to Google Maps™), screen  32  shows train orders control data, and screen  34  shows train radio communication data (i.e. the position of radios on locomotives on a rail network, where each line on the screen is a linear representation of a railway line). 
         [0025]    The train position data is transmitted in the form of a message  36  (see  FIG. 1 ). The content of message  36  is as follows: 
         [0000]    
       
         
               
               
             
           
               
                   
               
             
             
               
                   
                 &lt;Vehicle&gt; 
               
               
                   
                   &lt;ID&gt; RLS4537 &lt;/ID&gt; 
               
               
                   
                   &lt;Time&gt;2014-04-12 19:50:23 &lt;/Time&gt; 
               
               
                   
                   &lt;Type&gt;SC3T&lt;/Type&gt; 
               
               
                   
                   &lt;Loc&gt; 
               
               
                   
                     &lt;Lat&gt;−31.4564&lt;/Lat&gt; 
               
               
                   
                     &lt;Lon&gt;151.242&lt;/Lon&gt; 
               
               
                   
                   &lt;/Loc&gt; 
               
               
                   
                 &lt;/Vehicle&gt; 
               
               
                   
               
             
          
         
       
     
         [0026]    The “Vehicle” message  36  shown above begins with the code “&lt;Vehicle&gt;” and ends with the code “&lt;/Vehicle&gt;”, where the symbols “&lt;/&gt;” designate the end of a line of code. 
         [0027]    The items above represented in brackets “&lt; &gt;” are referred to as “tags.” Each line of code in the message is referred to as an “element.” The items between the arrows “&lt;” and “&gt;” are referred to as “attributes.” 
         [0028]    The ID number “RLS4537” represents the identification number of a GPS receiver on locomotive  12 . The time element “2014-04-12 19:50:23” represents the time when the locomotive was at −31.4564 latitude and 151.242 longitude. 
         [0029]    The system utilises a schema which defines the possible elements in a message. The schema file is referred to as a Document Type Definition (“DTD”) file. 
         [0030]    For example, the schema for the message  36  allows attributes to be input for the vehicle including &lt;ID&gt;, &lt;Time&gt;, &lt;Type&gt;, &lt;Loc(ation)&gt;. The system enables any attributes to be inserted in the elements provided in the schema. For example, the element &lt;fuel level&gt; could be added to the schema, as long as the “fuel level” element is defined in the DTD. An extensive list of sample attributes which could be included in a schema for a train control operation system is set out in Appendix 1. 
         [0031]    An example section of data in a DTD file is as follows: 
         [0000]    
       
         
               
             
           
               
                   
               
             
             
               
                 &lt;!ELEMENT Engine (EngineClass, EngineNumber, PositionOnTrain, 
               
               
                 EngineType, Location, Location, Weight, WorkingMode, Fuel?, 
               
               
                 MobilePhone?, Driver?, Driver?)&gt; 
               
               
                 &lt;!ELEMENT EngineClass (#PCDATA)&gt; 
               
               
                 &lt;!ELEMENT EngineNumber (#PCDATA)&gt; 
               
               
                 &lt;!ELEMENT PositionOnTrain (#PCDATA)&gt; 
               
               
                 &lt;!ELEMENT EngineType (#PCDATA)&gt; 
               
               
                 &lt;!ELEMENT WorkingMode (#PCDATA)&gt; 
               
               
                 &lt;!ELEMENT Fuel  (#PCDATA)&gt; 
               
               
                 &lt;!ELEMENT MobilePhone (#PCDATA)&gt; 
               
               
                 &lt;!ELEMENT Driver (Name,Location?,Time24hr?)&gt; 
               
               
                 &lt;!ELEMENT Name (#PCDATA)&gt; 
               
               
                   
               
             
          
         
       
     
         [0032]    The first section of code written above defines the elements which are used in the DTD file. These elements include the locomotive attributes “Engine Class”, “Engine Number”, “Position on Train”, “Engine Type”, “Origin”, “Planned Destination”, “Gross Mass”, “Working Mode”, “Fuel (Litres)”, “Mobile Phone Number”, “Driver (name)”, “Second Person (second driver).” 
         [0033]    The schema may have hierarchy of levels. For example, the element “Driver” is a sub-schema relating to the driver&#39;s name, the depot he is from, and the time he went on duty. The element “Engine” has a sub-element “Driver”. 
         [0034]    The DTD file has to be a well formed XML document (i.e. the DTD file must comply with the standard XML formatting rules). 
         [0035]    The DTD file is hosted on a subscription server  38 . There are three primary methods in which the DTD file (describing the various schema) can be accessed by subscribers in the rail network control system from the subscription server  38 . A first method is to host the DTD data on web-based Uniform Resource Locator (URL) such as www.4tel.com.au/rsml.dtd. A second method is to store the DTD locally on the receiving computer such as C://location/DTD/rsml.dtd. A third method is to embed the DTD in a message header format (i.e. within the message file itself). 
         [0036]    The computers receiving data (shown as screens  28 ,  30 ,  32  and  34 ) need to access the DTD to identify new elements. The position collection server  24  generating the data also needs to access the DTD so that it can populate the attributes which are then distributed to the subscribers. 
         [0037]    A new element may be added to the DTD file at any time (e.g. a “fuel level” element). The data in the message  36  is sent to each of the subscribers of the subscription server (e.g. shown on screens  28 ,  30 ,  32  and  34 ). If the application running on the subscriber&#39;s computer does not recognise the fuel level element, then it can access the DTD file to identify the attributes of that element and then process that element. 
         [0038]    In prior art systems, if new data relating to the operation of rail network needs to be sent to subscribers of the system, the conventional method of distributing that data is to relay it individually to each end subscriber. The disadvantage of this linear form of communication is that each subscriber may receive different data, or data in a different format specified for their particular computer interface. This approach is not readily scalable if new subscribers wish to access the system. 
         [0039]    By contrast, the present invention directs each end subscriber to a single location in which they can access the data on a single subscription server. This provides a universal and uniform source of understanding the data stream s across the networks. The present invention has a one-to-many distribution architecture that presents, in effect, zero marginal cost to add a new marginal subscriber. 
         [0040]    In compliance with the statute, the invention has been described in language more or less specific to structural or methodical features. It is to be understood that the invention is not limited to specific features shown or described since the means herein described comprises preferred forms of putting the invention into effect. The particular features, structures, or characteristics of the invention may be combined in any suitable manner in one or more combinations. The invention is, therefore, claimed in any of its forms or modifications within the proper scope of the appended claims (if any) appropriately interpreted by those skilled in the art. 
         [0000]    
       
         
               
               
               
               
               
               
               
             
           
               
                 APPENDIX 1 
               
               
                   
               
               
                 Element/ 
                   
                   
                   
                   
                   
                   
               
               
                 Attribute 
                   
                 Data 
                   
                   
                   
                   
               
               
                 Name 
                 Description 
                 Type 
                 Size and format 
                 Units 
                 Accuracy 
                 Constraints 
               
               
                   
               
             
             
               
                 ArrivalCode 
                 Security (arrival) code 
                 Text 
                 4 Alpha 
                 — 
                 — 
                 — 
               
               
                   
                 for the location at the 
                   
                 Numeric 
                   
                   
                   
               
               
                   
                 limit of the Train Order 
                   
                 characters 
                   
                   
                   
               
               
                 Authority 
                 The authority 
                 Text 
                 1-20 chars 
                 — 
                 — 
                 — 
               
               
                   
                 responsible for the 
                   
                   
                   
                   
                   
               
               
                   
                 RSML 
                   
                   
                   
                   
                   
               
               
                 Consignee 
                 Receiver of the 
                 Text 
                 List of values (2- 
                 — 
                 — 
                 — 
               
               
                   
                 consignment 
                   
                 3 chars 
                   
                   
                   
               
               
                 Container 
                 Number of containers 
                 Integer 
                 1 digit 
                 — 
                 — 
                 — 
               
               
                 Count 
                 on the vehicle. 
                   
                   
                   
                   
                   
               
               
                 Contents 
                 Commodity of the 
                 Text 
                 List of values (3- 
                 — 
                 — 
                 — 
               
               
                   
                 consignment. 
                   
                 4 chars) 
                   
                   
                   
               
               
                 Count 
                 Number of vehicles 
                 Integer 
                 1-5 digits 
                 — 
                 — 
                 — 
               
               
                   
                 excluding working 
                   
                   
                   
                   
                   
               
               
                   
                 engines. 
                   
                   
                   
                   
                   
               
               
                 Date 
                 Date 
                 Y2K 
                 DD/MM/YYYY 
                 — 
                 — 
                 — 
               
               
                   
                   
                 DMY 
                 (eg 05/11/1998) 
                   
                   
                   
               
               
                 Departure 
                 The security (departure) 
                 Text 
                 4 AlphaNumeric 
                 — 
                 — 
                 — 
               
               
                 Code 
                 code for the location 
                   
                 characters 
                   
                   
                   
               
               
                   
                 from where the train is 
                   
                   
                   
                   
                   
               
               
                   
                 authorised to depart. 
                   
                   
                   
                   
                   
               
               
                 Description 
                 Description 
                 Text 
                 1-30 chars 
                 — 
                 — 
                 — 
               
               
                 DGClass 
                 Dangerous goods code. 
                 Text 
                 List of values (1- 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 3 chars) 
                   
                   
                   
               
               
                 DrawGear 
                 Draw gear capacity. 
                 Float 
                 1-6 digits total 
                 — 
                 1 decimal 
                 — 
               
               
                 Capacity 
                   
                   
                   
                   
                 place 
                   
               
               
                 EmpNumber 
                 Employee No 
                 Integer 
                 1-7 digits 
                 — 
                 — 
                 — 
               
               
                 EngineClass 
                 Check letter of the 
                 Text 
                 List of values (1 
                 — 
                 — 
                 — 
               
               
                   
                 vehicle. 
                   
                 char) 
                   
                   
                   
               
               
                 EngineNo 
                 Lead locomotive 
                 Integer 
                 5 digits OR 
                 — 
                 — 
                 — 
               
               
                   
                 number of the train for 
                   
                 select from list 
                   
                   
                   
               
               
                   
                 which the Train Order 
                   
                   
                   
                   
                   
               
               
                   
                 is being issued. 
                   
                   
                   
                   
                   
               
               
                 Engine 
                 Number of the vehicle. 
                 Integer 
                 1-10 digits 
                 — 
                 — 
                 — 
               
               
                 Number 
                   
                   
                   
                   
                   
                   
               
               
                 EngineType 
                 Class of the vehicle. 
                 Text 
                 List of values (1- 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 4 chars) 
                   
                   
                   
               
               
                 FlagfallType 
                 ‘Priority’ on which the 
                 Text 
                 List of values (1 
                 — 
                 — 
                 — 
               
               
                   
                 flagfall component of 
                   
                 char) i.e. P, H, S, L 
                   
                   
                   
               
               
                   
                 the access charges will 
                   
                   
                   
                   
                   
               
               
                   
                 be based - (P)remium, 
                   
                   
                   
                   
                   
               
               
                   
                 (H)igh, (S)tandard, 
                   
                   
                   
                   
                   
               
               
                   
                 (L)ow. 
                   
                   
                   
                   
                   
               
               
                 Fuel 
                 Fuel 
                 Integer 
                 1-5 digits 
                 Litres 
                 — 
                 — 
               
               
                 Fulfilment 
                 Security (fulfilment) 
                 Text 
                 4 AlphaNumeric 
                 — 
                 — 
                 — 
               
               
                 Code 
                 code provided by the 
                   
                 characters 
                   
                   
                   
               
               
                   
                 train controller. 
                   
                   
                   
                   
                   
               
               
                 Hpt 
                 Horsepower per tonne. 
                 Float 
                 1-10 digits 
                 Hp/t 
                 0-7 
                 — 
               
               
                   
                   
                   
                   
                   
                 decimals 
                   
               
               
                 IntSpeed 
                 Restricted FRT Speed 
                 Integer 
                 1-5 digits 
                 Kilometres 
                 — 
                 — 
               
               
                 KgeLocation 
                 To/From Kilometrage 
                 Integer 
                 6 digits 
                 Kilometres 
                 — 
                 — 
               
               
                 Length 
                 Length (in metres) of 
                 Float 
                 1-6 digits 
                 Metres 
                 0-3 
                 — 
               
               
                   
                 the vehicle 
                   
                   
                   
                 decimals 
                   
               
               
                 Location 
                 Place, station, town 
                 Text 
                 List of values (3 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 chars) 
                   
                   
                   
               
               
                 MobilePhone 
                 Mobile phone number. 
                 Mixed 
                 9-15 digits 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 (spaces allowed) 
                   
                   
                   
               
               
                 Month 
                 Month 
                 Integer 
                 1-2 digits 
                 — 
                 — 
                 — 
               
               
                 MsgContent 
                 Comments related to 
                 Text 
                 Free Text 
                 — 
                 — 
                 — 
               
               
                   
                 this Train Notice 
                   
                   
                   
                   
                   
               
               
                 Name 
                 Driver name 
                 Text 
                 1-40 chars 
                 — 
                 — 
                 — 
               
               
                 NoticeID 
                 Train Notice Number 
                 Integer 
                 1-5 digits 
                 — 
                 — 
                 — 
               
               
                 Operator 
                 Code which identifies 
                 Integer 
                 List of values (2- 
                 — 
                 — 
                 — 
               
               
                   
                 the company operating 
                   
                 3 chars) 
                   
                   
                   
               
               
                   
                 the train 
                   
                   
                   
                   
                   
               
               
                 OrderNo 
                 Number provided by 
                 Integer 
                 1-5 digits 
                 — 
                 — 
                 — 
               
               
                   
                 the train controller - 
                   
                   
                   
                   
                   
               
               
                   
                 generated by the 
                   
                   
                   
                   
                   
               
               
                   
                 computer on a weekly 
                   
                   
                   
                   
                   
               
               
                   
                 basis 
                   
                   
                   
                   
                   
               
               
                 OrderType 
                 Type order applicable - 
                 Text 
                 List of values eg 
                 — 
                 — 
                 — 
               
               
                   
                 Train, Mishap or Shunt 
                   
                 “TRAIN” - 
                   
                   
                   
               
               
                   
                   
                   
                 select from list 
                   
                   
                   
               
               
                 Organisation 
                 Organisation 
                 Text 
                 1-25 chars 
                 — 
                 — 
                 — 
               
               
                 Packaging 
                 Refer to the goods 
                 Text 
                 List of values (1 
                 — 
                 — 
                 — 
               
               
                   
                 being (P)ackaged or in 
                   
                 char) i.e. P, B 
                   
                   
                   
               
               
                   
                 (B)ulk. 
                   
                   
                   
                   
                   
               
               
                 PositionOn 
                 Position of the vehicle 
                 Integer 
                 1-2 digits 
                 — 
                 — 
                 — 
               
               
                 Train 
                 on the train. 
                   
                   
                   
                   
                   
               
               
                 Preference 
                 Preferential handling - 
                 Alpha 
                 1-9 chars 
                 — 
                 — 
                 — 
               
               
                   
                 identification of the 
                   
                   
                   
                   
                   
               
               
                   
                 urgency for handling/ 
                   
                   
                   
                   
                   
               
               
                   
                 processing 
                   
                   
                   
                   
                   
               
               
                 Priority 
                 Train priority. 
                 Text 
                 List of values 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 (MANDATORY/ 
                   
                   
                   
               
               
                   
                   
                   
                 CONDITIONAL/ 
                   
                   
                   
               
               
                   
                   
                   
                 UN- 
                   
                   
                   
               
               
                   
                   
                   
                 PLANNED 
                   
                   
                   
               
               
                   
                   
                   
                 CONDITIONAL) 
                   
                   
                   
               
               
                 Sender 
                 Sender of the 
                 Text 
                 List of values (2- 
                 — 
                 — 
                 — 
               
               
                   
                 consignment. 
                   
                 3 chars) 
                   
                   
                   
               
               
                 Sequence 
                 The sequence number 
                 Integer 
                 1-6 digits 
                 — 
                 — 
                 — 
               
               
                 Number 
                 of the RSML (with 
                   
                   
                   
                   
                   
               
               
                   
                 respect to the 
                   
                   
                   
                   
                   
               
               
                   
                 originating system) sent 
                   
                   
                   
                   
                   
               
               
                   
                 for the given date 
                   
                   
                   
                   
                   
               
               
                   
                 (resets each 24 hour 
                   
                   
                   
                   
                   
               
               
                   
                 period) 
                   
                   
                   
                   
                   
               
               
                 ShuntAccess 
                 Is shunt access 
                 Text 
                 List of values 
                 — 
                 — 
                 — 
               
               
                   
                 authorised at this 
                   
                 (YES or NO) 
                   
                   
                   
               
               
                   
                 location? 
                   
                   
                   
                   
                   
               
               
                 SpecialInstr 
                 Special instructions for 
                 Text 
                 Free Text 
                 — 
                 — 
                 — 
               
               
                   
                 this section, such as 
                   
                   
                   
                   
                   
               
               
                   
                 particulars of a crossing 
                   
                   
                   
                   
                   
               
               
                   
                 movement 
                   
                   
                   
                   
                   
               
               
                 SpeedStatus 
                 Speed Status 
                 Text 
                 List of values 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 (PLACED/ 
                   
                   
                   
               
               
                   
                   
                   
                 MODIFIED/ 
                   
                   
                   
               
               
                   
                   
                   
                 LIFTED/ 
                   
                   
                   
               
               
                   
                   
                   
                 REPLACED) 
                   
                   
                   
               
               
                 Status 
                 Indicates whether the 
                 Text 
                 List of values (1 
                 — 
                 — 
                 — 
               
               
                   
                 train is (P)lanned to run 
                   
                 char) i.e. P, R, 
                   
                   
                   
               
               
                   
                 but not yet departed, 
                   
                 A, C, T 
                   
                   
                   
               
               
                   
                 (R)unning, (A)rrived, 
                   
                   
                   
                   
                   
               
               
                   
                 (C)ancelled or 
                   
                   
                   
                   
                   
               
               
                   
                 (T)erminated short of 
                   
                   
                   
                   
                   
               
               
                   
                 its destination. 
                   
                   
                   
                   
                   
               
               
                 SystemID 
                 The system identifier 
                 Text 
                 1-50 chars 
                 — 
                 — 
                 — 
               
               
                 Time24 hr 
                 The time at which an 
                 24 Hr 
                 HH:MM time 
                 — 
                 — 
                 — 
               
               
                   
                 event occurred. 
                 Time 
                 (eg 10:20) 
                   
                   
                   
               
               
                 Title 
                 Title 
                 Text 
                 1-35 Alpha 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 Numeric 
                   
                   
                   
               
               
                   
                   
                   
                 characters 
                   
                   
                   
               
               
                 Track 
                 Track Direction 
                 Text 
                 List of values 
                 — 
                 — 
                 — 
               
               
                 Direction 
                   
                   
                 (UPTRACK/ 
                   
                   
                   
               
               
                   
                   
                   
                 DOWNTRACK/ 
                   
                   
                   
               
               
                   
                   
                   
                 BOTH) 
                   
                   
                   
               
               
                 TrackType 
                 Where train will be 
                 Text 
                 List of values Eg 
                 — 
                 — 
                 — 
               
               
                   
                 standing on. Eg: Loop, 
                   
                 “Loop” - select 
                   
                   
                   
               
               
                   
                 etc... 
                   
                 from list 
                   
                   
                   
               
               
                 TrainNo 
                 Number of the train for 
                 Text 
                 List of values (1 
                 — 
                 — 
                 — 
               
               
                   
                 which the Train Order 
                   
                 char 3 digits) eg 
                   
                   
                   
               
               
                   
                 is being issued 
                   
                 1974 
                   
                   
                   
               
               
                 TrainNumber 
                 Train identifier. 
                 Text 
                 1-5 chars 
                 — 
                 — 
                 — 
               
               
                 TrainType 
                 Code which identifies 
                 Text 
                 List of values (2 
                 — 
                 — 
                 — 
               
               
                   
                 the type of train. 
                   
                 chars) 
                   
                   
                   
               
               
                 Type 
                 Train Notice Type 
                 Text 
                 1 Alpha char 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 (D)aily, 
                   
                   
                   
               
               
                   
                   
                   
                 (T)emporary 
                   
                   
                   
               
               
                   
                   
                   
                 Standard, 
                   
                   
                   
               
               
                   
                   
                   
                 (S)tandard 
                   
                   
                   
               
               
                 UNNumber 
                 UN number. 
                 Mixed 
                 “UN” + 4 digits 
                 — 
                 — 
                 — 
               
               
                 UserID 
                 ID of user issuing this 
                 Text 
                 1-12 Alpha 
                 — 
                 — 
                 — 
               
               
                   
                 Train Notice 
                   
                 Numeric 
                   
                   
                   
               
               
                   
                   
                   
                 Characters 
                   
                   
                   
               
               
                 Version 
                 The relevant DTD 
                 Float 
                 3-4 digits 
                 — 
                 2 decimals 
                 — 
               
               
                   
                 version number 
                   
                   
                   
                   
                   
               
               
                 WagonClass 
                 Check letter of the 
                 Text 
                 List of values (1 
                 — 
                 — 
                 — 
               
               
                   
                 vehicle. 
                   
                 char) 
                   
                   
                   
               
               
                 Wagon 
                 Number of the vehicle. 
                 Integer 
                 List of values (1- 
                 — 
                 — 
                 — 
               
               
                 Number 
                   
                   
                 10 digits) 
                   
                   
                   
               
               
                 WagonType 
                 Class of the vehicle. 
                 Text 
                 List of values (1- 
                 — 
                 — 
                 — 
               
               
                   
                   
                   
                 4 chars) 
                   
                   
                   
               
               
                 Weight 
                 Gross mass of the 
                 Float 
                 1-8 digits 
                 Tonnes 
                 0-4 
                 — 
               
               
                   
                 vehicle 
                   
                   
                   
                 decimals 
                   
               
               
                 Working 
                 Indicates if the vehicle 
                 Text 
                 List of values (1 
                 — 
                 — 
                 — 
               
               
                 Mode 
                 is a (W)orking engine, 
                   
                 char) i.e. W, A, 
                   
                   
                   
               
               
                   
                 (A)ssisting engine, 
                   
                 F, H 
                   
                   
                   
               
               
                   
                 (F)ailed engine or a 
                   
                   
                   
                   
                   
               
               
                   
                 (H)auled vehicle. 
                   
                   
                   
                   
                   
               
               
                 Year 
                 Year 
                 Integer 
                 4 digits 
                 — 
                 — 
                 —