![]() ![]() Likewise, the recipient decodes the bytes according to the data member types in its Slice definition (which must match the sender's Slice definition). We did not plan for this feature when we designed the Ice encoding version 1.0 many years ago, and we had no way to encode and decode such optional data members: when marshaling a class instance, the data members are simply encoded one after the other according to each data member's type. This page describes the motivation for introducing encoding version 1.1 and presents potential interoperability issues between Ice applications that use different encoding versions (with solutions). Likewise, Ice 3.6 and later support encoding versions 1.0 and 1.1. Ice 3.5 also supports protocol 1.0 and encoding 1.0, and introduced a new encoding version, 1.1. Ice maintains separate versions for the protocol and encoding, which makes it possible for them to evolve independently. All Ice releases prior to Ice 3.5 supported only one protocol version (1.0) and one encoding version (1.0). Rules that describe the types of messages used by Ice applications (request, reply, batch request, validate connection, etc.), the format of these messages (headers, a field that carries the length of the message, etc.), and the order in which these messages are exchanged.For example, according to the Ice encoding rules, a string is always encoded as the string size (using 1 to 4 bytes, depending on the actual string size, in little-endian format), followed by its characters in UTF-8 format. ![]() Rules that describe how data types are marshaled into streams of bytes, known as encoding.The Ice protocol consists of two distinct sets of rules: ![]()
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