The CRIL (Computer Representation of Individual Languages) conventions have been defined and proposed by a working group at the 1989 Kiel Convention of the International Phonetic Association . The conventions consist of two parts, as follows:
The first component was introduced to enable broader use and dissemination of the descriptive IPA categories: i.e. the IPA symbols as well as the IPA diacritics needed for the narrow transcription of normal and defective utterances.
The second component of CRIL is devoted to a standardised representation of natural speech productions and introduces three systematically distinct levels for specifying what could be called the text of a spoken utterance. These levels are as follows:
The CRIL conventions have been shown to work very well for the characterisation of speech data in the German PHONDAT and VERBMOBIL-PHONDAT corpora. However, the SAM conventions described below offer the opportunity to represent more detail.