Tessallite Community Source Available License Version: 1.0 Effective date: 2026-06-23 Copyright (c) 2026 Tessallite Ltd. This is a source-available license for Tessallite Community source code that Tessallite Ltd intentionally publishes to the public Tessallite Community repository. The permitted source review, internal evaluation, development, and self-hosted Community use rights are set out below. ## 1. Licensor Licensor means Tessallite Ltd, a company registered in England and Wales (company number 17243379), registered office 8 Lambert Road, Barking, England, United Kingdom, IG11 0QW. Where these terms use "Tessallite" as the licensor or an acting party, that means Tessallite Ltd. ## 2. Covered Source Covered Source means source code, documentation, configuration templates, scripts, and related files that Tessallite intentionally publishes in the public Tessallite Community repository and that do not carry a separate license notice. Covered Source does not include: - proprietary license manager implementations; - gateway guard or admission-control modules; - internal request-token issuer or verifier modules when shipped as proprietary runtime components; - model-service policy modules or compiled model-service builds when shipped as proprietary runtime components; - license issuer, signing, release, registry, website, or customer-provisioning systems; - private release or signing automation; - optional optimizer, acceleration planner, aggregate/pocket matcher, exactness validator, aggregate/pocket rewrite, and related proprietary modules; - compiled object code, container image layers, appliance images, VM images, hosted services, release bundles, or enterprise artifacts unless expressly identified as Covered Source; - Tessallite trademarks, logos, names, domains, product marks, or brand assets; - third-party components, which remain governed by their own licenses. ## 3. Permitted Use Subject to these terms, Tessallite grants you a limited, non-exclusive, non-transferable, royalty-free license to: - view, clone, and study the Covered Source; - modify the Covered Source for your own internal evaluation, development, testing, training, and self-hosted Community use; - run Tessallite Community Edition for your own internal use, subject to the Community Edition terms, signed local license, and product limits that apply to your installation; - make a reasonable number of internal copies for backup, development, testing, and security review; - submit issues, patches, or pull requests to Tessallite. ## 4. Commercial Boundaries The source-available grant is intended for internal review, evaluation, development, testing, training, and self-hosted Community use. A separate written agreement with Tessallite is required to: - sell, sublicense, rent, lease, distribute, or transfer the Covered Source or modified versions to a third party; - provide Tessallite, the Covered Source, modified versions, or derivative works as a hosted, managed, bureau, resale, OEM, white-label, embedded, or service-provider offering to third parties; - use the Covered Source to build or offer a competing commercial semantic layer, BI gateway, analytics platform, managed service, or substantially similar product; - publish, share, or distribute patches, forks, builds, images, or packages that include Proprietary Components or Tessallite proprietary material. You agree to keep copyright, trademark, proprietary, and license notices in place; use Tessallite names, logos, domains, marks, and brand assets only as allowed by written brand guidance; use signed-license and entitlement controls as provided; and not reverse engineer, decompile, disassemble, or attempt to extract source code from Proprietary Components except to the extent mandatory law permits it. ## 5. Community Edition Runtime Terms Running Tessallite Community Edition may require a signed local license file and is also governed by `LICENSE-COMMUNITY.md`. If these source-available terms conflict with `LICENSE-COMMUNITY.md` for Community runtime use, the Community runtime terms control unless Tessallite signs a written exception. ## 6. Enterprise Terms Enterprise Edition, production rights beyond Community Edition, support, customer-specific entitlements, proprietary components, private bundles, and commercial artifacts are governed by `LICENSE-ENTERPRISE.md` and the applicable written order or agreement. ## 7. Contributions Unless Tessallite signs a separate contributor agreement or states otherwise in writing, any contribution you submit to Tessallite may be used, modified, sublicensed, and redistributed by Tessallite under any Tessallite license or commercial terms. Do not submit material you do not have the right to contribute. ## 8. Ownership Tessallite and its licensors retain all rights not expressly granted. The Covered Source and Proprietary Components are licensed, not sold. No rights are granted by implication, exhaustion, waiver, estoppel, or otherwise. ## 9. Third-Party Components Third-party components retain their own licenses. See `THIRD_PARTY_NOTICES.md`. For a third-party component, the third-party license controls that component only. ## 10. Termination If you materially breach these terms, your rights under this license end unless Tessallite agrees otherwise in writing. You must then stop using the Covered Source and destroy copies in your possession or control, except where retention is required by law. ## 11. Warranty Disclaimer The Covered Source is provided without a commercial warranty unless Tessallite agrees otherwise in writing. To the maximum extent permitted by law, Tessallite does not provide implied warranties for the Covered Source, Community Edition, documentation, examples, demo data, container images, installation scripts, or related materials. ## 12. Limitation Of Liability To the maximum extent permitted by law, Tessallite is not liable for indirect, special, incidental, consequential, exemplary, or punitive damages, or for loss of profits, revenue, goodwill, data, or business opportunity. Tessallite's aggregate liability under these terms is limited to GBP 100. ## 13. Governing Law These terms are governed by the laws of England and Wales. The courts of England and Wales have exclusive jurisdiction, unless a separate written agreement signed by Tessallite states otherwise. ## 14. Contact For licensing questions, contact info@tessallite.io.