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Eshu: An Extensible Web Editor for Diagrammatic Languages Leal, José Paulo Correia, Helder Paiva, José Carlos Diagram assessment language environments automated assessment e-learning The corner stone of a language development environment is an editor. For programming languages, several code editors are readily available to be integrated in Web applications. However, only few editors exist for diagrammatic languages. Eshu is an extensible diagram editor, embeddable in Web applications that require diagram interaction, such as modeling tools or e-learning environments. Eshu is a JavaScript library with an API that supports its integration with other components, including importing/exporting diagrams in JSON. Eshu was already integrated in a pedagogical environment with automated diagram assessment, configured for extended entity-relationship diagrams, that served as basis for an usability evaluation. Schloss Dagstuhl – Leibniz-Zentrum für Informatik José Paulo Leal and Helder Correia and José Carlos Paiva 2016 Is Part Of OASIcs, Volume 51, 5th Symposium on Languages, Applications and Technologies (SLATE'16) (2016) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/OASIcs.SLATE.2016.12 urn:nbn:de:0030-drops-60178 https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.SLATE.2016.12 eng https://creativecommons.org/licenses/by/3.0/legalcode