FACR (Frogans Address Composition Rules) represents the composition rules applicable to Frogans addresses.

Technical specifications


FACR 1.1 - Latest version - Adopted on June 28, 2022 - Status: In force

The FACR technical specification sets forth the composition rules applicable to Frogans addresses. These rules focus on security. They manage language-related issues by introducing the concepts of linguistic categories and convergence forms. The composition rules apply to Frogans addresses that are compliant with the pattern defined in the International Frogans Address Pattern (IFAP) specification.

Compared to version 1.0, version 1.1 simplifies the method for checking whether two valid site names are convergent.

Given that the changes between version 1.0 and version 1.1 are limited to a single specific method and that all the other rules are left unchanged, it was decided that the FACR 1.1 specification must only include the description of the new method and must not repeat descriptions that have not changed and are available in the FACR 1.0 specification, such as terminology, new concepts, unchanged methods, and appendices.

All the appendices of the FACR 1.0 specification, which provide assistance in implementing composition rules, can still be used for implementing version 1.1 of the composition rules.

Previous versions


FACR 1.0 - Adopted on December 4, 2014 - Status: Obsoleted by FACR 1.1

The FACR technical specification sets forth the composition rules applicable to Frogans addresses. These rules focus on security. They manage language-related issues by introducing the concepts of linguistic categories and convergence forms. The composition rules apply to Frogans addresses that are compliant with the pattern defined in the International Frogans Address Pattern (IFAP) specification.

Reference implementations

The reference implementation of the FACR technical specification is under development.

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