Update README.md

README.md

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 ### Licensing Information
 
-CATalog is a collection of text documents from sources with various licenses. The whole work is licensed under the most restrictive license in the corpus, which is [Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International](https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es) license. Any use of all or part of the text gathered in CATalog must abide by the terms of the original licenses, including attribution clauses when relevant. We facilitate this by providing provenance information for each data point.
+**Licensing and Usage Terms**: CATalog is a curated aggregation of multiple data sources compiled by BSC-CNS for research and development in natural language processing. The dataset as a whole does not carry a unified license. The use, reuse, and redistribution of each part of this dataset is governed by the license of its original source. You can find a detailed list of all sources and their associated licenses in the Licensing Information section and in the licenses.json file. Please consult the license of each dataset before using it in your projects. If you intend to redistribute this dataset, you must include the licensing metadata (e.g., licenses.json) alongside the data as a clear reporting of its mixed licensing structure. There is no explicit data intermediary mechanism; BSC-CNS has collected and used the data according to the terms of each data source license or through private Data Sharing Agreements. BSC-CNS acts solely as a curator and aggregator and does not assert ownership or control over third-party content included in this dataset. Users are solely responsible for ensuring compliance with the respective licenses and terms of use for each data source.
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+**Disclaimer**: CATalog is provided "as is", without warranty of any kind, express or implied, including but not limited to warranties of merchantability or fitness for a particular purpose. The dataset has been developed at a research institution (BSC-CNS) as part of ongoing experimental research and is therefore subject to errors, omissions, and inaccuracies. This dataset is not a product and therefore has not been subjected to quality control. BSC-CNS makes no guarantees regarding the accuracy, completeness, non-infringement, reliability, or suitability or of the dataset for any specific purpose. Use of CATalog is at the user’s own risk.
 
 The list of [SPDX license identifiers](https://spdx.org/licenses/) included in the documentation can be found in the following table or in this [JSON file](https://huggingface.co/datasets/projecte-aina/CATalog/blob/main/licenses.json).