Abstract
In an heterogeneous environment, applications must agree the structure and a binary representation of the exchanged data. This can a priori be done by adopting by the two standards proposed by ISO: the Abstract Syntax Notation 1 (ASN-1) and the ASN-1 basic encoding rules (ASN1-BER). However, the ASN1-BER conversion procedures are highly CPU consuming, which is not acceptable for several "high speed" applications. We propose to use the presentation layer negotiation to select faster transfer syntax. We have experimented with a first "light weight" syntax since 1988, and have just completed the definition a new "flat tree light weight syntax", which can be orders of magnitude faster than the ASN1-BER.
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