On October 13, 2017, Singapore released Version 1.0 of the XML Schema necessary to comply with CRS reporting requirements as well as Guidance Notes to accompany the Schema. The Guidance Notes largely follows the CRS User Guide Version 2.0 found in Annex 3 of the Common Reporting Standard, but provides more details on how information for specific data elements should be presented.
Please follow this link to access the XML Schema (downloads as .zip file).
Please follow this link to access the User Guide.