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Based on web technologies and the Language Server Protocol (LSP), we realized a modeling tool for SAP CDS. Our tool supports the hybrid modeling of CDS and the import of existing SAP CDS view entities for analysis and development support. This model-driven approach aims to enable domain experts to develop CDS views, mitigating the need for extensive programming skills. We report on the development of the ER2CDS domain-specific language (DSL) and the implementation of the corresponding\n                    <jats:sc>bigER2CDS<\/jats:sc>\n                    modeling tool. Finally,\n                    <jats:sc>bigER2CDS<\/jats:sc>\n                    is evaluated in the form of a controlled experiment and a case study with domain experts and CDS developers. The results show a high usability score for our tool and a willingness by domain experts and CDS developers to use it. The tool can be freely downloaded from the VS Code marketplace:\n                    <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"https:\/\/marketplace.visualstudio.com\/items?itemName=BIGModelingTools.er2cds\" ext-link-type=\"uri\">https:\/\/marketplace.visualstudio.com\/items?itemName=BIGModelingTools.er2cds<\/jats:ext-link>\n                    .\n                  <\/jats:p>","DOI":"10.1007\/s10270-025-01320-2","type":"journal-article","created":{"date-parts":[[2025,9,6]],"date-time":"2025-09-06T09:37:02Z","timestamp":1757151422000},"page":"937-957","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Model-driven engineering of SAP core data services - the bigER2CDS modeling tool"],"prefix":"10.1007","volume":"25","author":[{"given":"Gallus","family":"Huber","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8259-2297","authenticated-orcid":false,"given":"Dominik","family":"Bork","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,9,6]]},"reference":[{"issue":"6","key":"1320_CR1","first-page":"574","volume":"24","author":"A Bangor","year":"2008","unstructured":"Bangor, A., Kortum, P.T., Miller, J.T.: An empirical evaluation of the system usability scale. 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