LCF – Layout Configuration Format

A Domain Specific Language tailored for Signaling Engineering

About LCF – Layout Configuration Format

LCF is a domain-specific language tailored for signaling engineering. It provides a universal way of expressing signaling configuration data in a compact and review-friendly format.

LCF solves the problem of storing configuration data in databases yet being able to manually review the data with a trusted procedure. It works for all signaling principles and any choice of signaling platforms using a powerful generic application configuration methodology.

The LCF format, together with Prover’s associated tool suite, offers an extensive machinery for checking correctness and consistency, and for computing derived data for use in design, testing, or formal verification of signaling systems. The configuration of this machinery is highly flexible and the resulting process is compliant with CENELEC SIL 4.

With the tool suite you get functionality for generating HLL for formal verification with Prover Certifier. You describe how the LCF configuration model is mapped to the object model in HLL, and the job is done.

Prover iLock can both read and write LCF. When using sign-off verification with Prover Certifier, Prover iLock can generate the required LCF data.

The LCF format and the tools around it realize a configuration process that becomes explicit (fully specified and documented), reviewable (the format is designed to be compact and easy to review), and approvable (CENELEC SIL 4).

The LCF specification is available for free on HAL.