Compound and Separate Spelling in Devanāgarī and Transliteration
Originally, Saṃskṛt was written continuously in Devanāgarī. This reflects the largely oral, recited tradition in which words flow into one another in melodic recitation. Since the 19th century, separate spelling has gradually become more common in Devanāgarī and in roman transliteration.
The in-depth article explains how these spelling conventions are handled in Devanāgarī and transliteration, and why sandhi still needs to be read along with them.