[Devanagari Details]

This table was derived from the following sources:

IDN Character Table for deva: https://github.com/dotse/IDN-ref-tables/blob/master/script-tables/devanagari-script-ref-table.txt

References for contextual rules

RFC 5891: "Internationalized Domain Names in Applications (IDNA): Protocol" 
(proposed standard), http://tools.ietf.org/html/rfc5891

Unicode Technical Standard 46 (UTS-46),
http://unicode.org/reports/tr46/

Code points requiring contextual rules

Code points: U+002D (HYPHEN-MINUS)
Reference: RFC 5891 (sec 4.2.3.1)
Rules: Label must neither start nor end with U+002D. Label must not have U+002D in both third and fourth position. 

Code points: U+0900..U+0903, U+093C, U+094D..U+094E, U+0953..U+0954 (DEVANAGARI SIGNS)
Reference: UTS46 (sec 4.1)
Rules: Combining characters cannot start a label.

Code points: U+093E..U+094C (DEVANAGARI DEPENDENT VOWEL SIGNS)
Reference: UTS46 (sec 4.1)
Rules: Dependent vowels, must be placed after their associated consonant and thus cannot start a label.

Code points: U+0955, U+0962, U+0963 (DEVANAGARI VOWEL SIGNS)
Reference: UTS46 (sec 4.1)
Rules: Combining code point cannot start a label.

Code points: U+A8E0..U+A8F1 (COMBINING MARKS)
Reference: UTS46 (sec 4.1)
Rules: Combining code point cannot start a label.

This table conforms to the format specified in RFC 3743.