Source: Singh, A. K., et al. (2020). RIS Converter: A Tool for Converting XML to RIS Format. Journal of Emerging Technologies in Library and Information Science, 3(1), 1-12.
If you have an XML file, you cannot simply "save as" RIS without knowing the specific schema. An XML file containing PubMed articles looks very different from an XML file containing Dublin Core library records. xml to ris
For large or complex conversions, automated scripts or dedicated tools are strongly recommended over manual editing. Source: Singh, A
A simple RIS entry looks like this: