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CAN/CSA-ISO/IEC 20970-04 (R2017)

Information Technology - Programming Languages, Their Environments and System Software Interfaces - JEFF File Format (Adopted ISO/IEC 20970:2002, first edition, 2002-07-01)

SKU: 2416236 Published by CSA Group Publication Year 2004 Reaffirmed in 2017 52 pages

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Preface/Scope

Scope

This International Standard can be used with benefits on all kinds of platform.

This International Standard's most immediate interest is for deploying portable applications on small footprint devices.

This International Standard provides dramatic savings of dynamic memory and execution time without sacrificing any of the flexibility usually attached to the use of non-pre-linked portable code. This International Standard is especially important to provide a complete solution to execute portable programs of which code size is bigger than the available dynamic memory.

This International Standard is also very important when fast reactivity of programs is important. By avoiding the extra-processing related to loading into dynamic memory and formatting classes at runtime, this International Standard provides a complete answer to the problem of class-loading slow-down. These benefits are particularly interesting for small devices supporting financial applications. Such applications are often complex and relying on code of significant size, while the pressure of the market often imposes to these devices to be of a low price and, consequently, to be very small footprint platforms.

In addition, to not impose unacceptable delays to customers, it is important these applications do not waste time in loading classes into dynamic memory when they are launched but, on the contrary, to be immediately actively processing the transaction with no delay. When using smart cards, there are also some loose real-time constraints that are better handled if it can be granted that no temporary freezing of processing can occur due to class loading.

This International Standard can also be of great benefit for devices dealing with real-time applications. In this case, avoiding the delays due to class loading can play an important role to satisfy real-time constraints.

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CAN/CSA-ISO/IEC 20970-04 (R2017)

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