HLL Forum – The community for us who use HLL2021-05-11T08:05:12+01:00

HLL Forum

The community for us who use HLL

Join the HLL community

The HLL Forum is the community for us who use the formal specification language HLL, and believe it is a good language for formal methods. As it has started to become a de facto standard, we want to make sure that the language develops in a controlled way to meet the demands of the future. The HLL Forum was formed in a first meeting in Paris on December 4th 2018. Since then, tool providers have been working together to merge their different dialects of HLL into one uniform language that we aim eventually to publish as the official next version of HLL.

Welcome to join the HLL Forum. By joining the community you ensure that your voice is heard.

Meetings so far:

  • 2018 December 4, at NOVOTEL Les Halles, Paris: Founding meeting
  • 2019 March 22, Language development group meeting (Prover, Systerel, SafeRiver, Ansys, RATP) at RATP: language proposal
  • 2019 November 21: Specification process proposal and next steps


HLL crash course for Safety Engineers

By |June 10th, 2020|

Beginning May 18th, I led a four-day online crash course on HLL for a dozen Safety Engineers. Due to the French COVID-19 lockdown, the course was conducted via Microsoft Teams, [...]

Using HLL to solve Sudoku puzzles

By |July 10th, 2019|

In a recent post we celebrated the 10th anniversary of the declarative, formal language HLL. The language is used extensively in the railway signaling domain for the formal verification of interlocking [...]

A new version of HLL emerging

By |April 10th, 2019|

The HLL Forum meeting we had in December decided to let a subgroup work on a new language definition meeting emerging needs in the market. Some of us in this [...]

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