Differently from other transliteration schemes for Sanskrit, it can represent not only the basic Devanagari letters, but also phonetic segments, phonetic features and punctuation. SLP1 also describes how to encode classical and Vedic Sanskrit.
One of the main advantages of SLP1 is that each Devanagari letter used in Sanskrit maps to exactly one ASCII character, making it possible to create simple conversions between ASCII and Sanskrit. For example, the Harvard-Kyoto transliteration uses the single character "D" to represent "ड" and the combination "Dh" to represent "ढ". SLP1, in contrast, always uses a single character: "q" for "ड" and "Q" for "ढ". Such intermediate mappings, while convenient for the design of transliteration conversion functions, tend to hinder readability until they are re-converted to either Devanagari or the widely used IAST romanization scheme.
The tables in the following sections are taken from Peter Scharf's May 2008 talk.
The numeral "3" is suffixed to denote a prolonged vowel (pluta svara). For example,
ओ३म् = o3m. Similarly, the numeral "1" is suffixed to denote a short "e" and "o", as in Dravidian:
ऎ = e1,
ऒ = o1. "1" and "3" are also used after a short and long agitated kampa respectively. Avagraha (ऽ) is represented by a single quote (').
Anunasika is represented by a tilde. For example,
माँ = mA~. Jihvamuliya and upadhmaniya are encoded as "Z" and "V" respectively.
Retroflex consonant LLA in Rig Vedic dialect (ळ, ଳ, ળ, ਲ਼, ళ, ಳ, ള, ள) is encoded as "L". Its aspirated counterpart LLHA (ळ्ह, ଳ୍ହ, ળ્હ, ਲ਼੍ਹ, ళ్హ, ಳ್ಹ, ള്ഹ, ள்ஹ) is encoded by "|" (vertical bar).
Udatta, anudatta and svarita are encoded as "/", "\" and "^" respectively.
- Sanskrit transliteration tool. Convert from one scheme to another. Maintained by the 'Indian language technology proliferation and deployment centre' (ILTP-DC) of the government of India. Works with 7 systems: Harvard-Kyoto, ITRANS, Velthuis, SLP, WX-system and IAST, Devanagari.
- Scharf, Peter M. Sanskrit Library Phonological Text Encoding Scheme 1 (basic) (PDF).
- Scharf, Peter M.; Hyman, Malcolm D. (2011). Linguistic Issues in Encoding Sanskrit (PDF). Archived from the original (PDF) on 2018.
- Mapping table with 7 methods of Harvard-Kyoto, ITRANS, Velthuis, SLP, WX-system and IAST, Devanagari used by ILTP-DC for Sanskrit.