Inspired by , Uriel Weinreich first advocated the use of diasystems in structural dialectology, and suggested that such a system would represent a higher level of abstraction that can unite related dialects into a single description and transcription. While phonemic systems describe the speech of a single variety, diaphonemic systems can reflect the contrasts that aren't made by all varieties being represented. The way these differ can be shown in the name "New York". This word may be transcribed phonemically as in American English, as many varieties thereof do not allow the cluster as a syllable onset; in Received Pronunciation, syllable-final doesn't occur so this name would be transcribed to reflect that pronunciation. A diaphonemic transcription such as (with both the and the ) would thus cover both dialects. Neither is described exactly, but both are derivable from the diaphonemic transcription.