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\n\n| Version No. | Change Details | Release Date |\n| --- | --- | --- |\n| 1.1 | First release of document, reflecting specifications for each dataset. | 04 Jun 2014 |\n| 1.2 | Amended attributes for all datasets, and added the update frequency for each dataset in specification section. | 15 Jun 2014 |\n| 1.3 | Inserted notes to denote fields that are new and upcoming; not yet available on the data feed. | 26 Jun 2014 |\n| 1.4 | Minor revisions (typo errors) . | 10 Mar 2015 |\n| 1.5 | Revisions to names of datasets, and removed listing for certain attributes that are redundant at this point. | 07 Apr 2015 |\n| 2.0 | Revised document for newly revamped DataMall.\u003Cbr>- New Categorisation of Datasets\u003Cbr>- Moved Park & Ride Location, Premium Bus Service, and Carpark Rates to Static Datasets listed on MyTransport. SG. | 13 Apr 2015 |\n| 2.1 | Corrected reference notes for Carpark Availability and ERP Rates. | 14 Apr 2015 |\n| 2.2\u003Cbr>2.2.1 | Added Bus Arrival, and Taxi Availability APIs\u003Cbr>Amended Update Freqs for Bus Arrival and Taxi Availability | 19 Apr 2015\u003Cbr>03 Jun 2015 |\n| 3.0 | Bus Arrival API is now enhanced! Latest *beta* release includes:\u003Cbr>- Additional 3rd set of ETA information\u003Cbr>- Estimated location (coordinates) of buses\u003Cbr>Look out for blue-highlights! | 12 Dec 2015 |\n| 3.1 | Public-Transport (Bus) Related APIs are enhanced (version 2)!\u003Cbr>- Bus Services and Bus Routes are now consolidated across Operators, e.g. SBST routes and SMRT routes in 1 single API\u003Cbr>- Attributes are renamed to be more meaningful\u003Cbr>- Bus Stops now include location (lat/long) coordinates Bug for Bus Arrival \\#VisitNumber fixed. | 08 Mar 2016 |\n| 3.2 | Changes to Traffic Related APIs:\u003Cbr>- URLs changed to point to version 2 of the APIs.\u003Cbr>- VCCType renamed to VehicleType (ERP Rates)\u003Cbr>- EstimatedTime renamed to EstTime (Estimated Travel Times)\u003Cbr>- RoadID renamed to EventID (Road Openings and Road Works)\u003Cbr>- ImageURL renamed to ImageLink (Traffic Images)\u003Cbr>- Band renamed to SpeedBand (Traffic Speed Bands) | 31 Mar 2016 |\n| 3.3 | Changes to API Response Size:\u003Cbr>- Taxi Availability API now returns 500 records per call.\u003Cbr>- Traffic Images API now returns 70 records per call.\u003Cbr>- Changes are reflected on Page 6, and on respective API URLs. | 08 Aug 2016 |\n| 3.4 | Changes to API authentication – now requiring only AccountKey. | 01 Nov 2016 |\n\n\n| 3.5 | Updated attribute description for location coordinates of Bus Arrival API. | 23 Nov 2016 |\n| --- | --- | --- |\n| 3.6 | Traffic Images API now returns all records per call. | 14 Dec 2016 |\n| 3.7 | Updated guide to making API calls, using Postman. | 05 Apr 2017 |\n| 4.0 | Bus Arrival API is now enhanced! Latest release includes:\u003Cbr>- New Attribute – Bus Type\u003Cbr>- Inclusion of Short Working Trip (SWT) Supplementary Services\u003Cbr>- Relegation of OriginCode and DestinationCode to vehicle level\u003Cbr>- Removal of entire response structure from API during nonoperating hours\u003Cbr>- Removal of Status Attribute\u003Cbr>- Renaming of values for Load Attribute\u003Cbr>- Renaming of SubsequentBus and SubsequentBus3 subset tags\u003Cbr>- Renaming of BusStopID Parameter to BusStopCode\u003Cbr>- Removal of SST Parameter. Timestamps are now in SST by default.\u003Cbr>- Rehashed advisement on Front-End Implementation for clarity. | 28 Jul 2017 |\n| 4.1 | Minor revisions to sample Bus Arrival API response. | 08 Sep 2017 |\n| 4.2 | Announcement on Changes to API Response Size is reflected on Page 6. | 15 Sep 2017 |\n| 4.3 | Deployment date has postponed for the increase of API Response Size. Please refer to Page 6 for the latest announcement. | 06 Oct 2017 |\n| 4.4 | Response Size for all APIs (except Bus Arrival API) have been increased to 500 records per call. | 16 Oct 2017 |\n| 4.5 | Carpark Availability API is now enhanced! Latest release includes:\u003Cbr>- Includes HDB, LTA and URA carpark availability data\u003Cbr>- New Attribute – Lot Type, Agency\u003Cb","cbCailMidxbJmum2","https://ap.wps.com/l/cbCailMidxbJmum2","pdf",1606188,83,"English","# Document Change Log\n## Version history (1.1-5.4)","[{\"question\":\"What does the document primarily provide?\",\"answer\":\"It provides the API User Guide \\u0026 Documentation for the LTA Open Data Initiative, including a detailed Document Change Log across versions.\"},{\"question\":\"Which types of updates are recorded in the change log?\",\"answer\":\"The change log records dataset specification updates, attribute additions/renames, API response size and structure changes, and authentication changes.\"},{\"question\":\"What is highlighted for newer or enhanced APIs like Bus Arrival?\",\"answer\":\"It notes enhancements such as additional ETA information, estimated bus locations, and the inclusion or removal of specific response fields and parameters across releases.\"}]","LTA Open Data Initiative - API User Guide & Documentation - Version 6.11 | PDF",209]