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Cross Reference Detection

This service was created as a result of the OpenReq project funded by the European Union Horizon 2020 Research and Innovation programme under grant agreement No 732463.


The cross-reference detection tool is a Requirement Engineering (RE) tool used to identify cross-references from requirements. These requirements can be in a database, or in an HTML document. Cross-references are dependencies explicitly stated, either internal (between requirements of the same project), or external (between a requirement and an external source).

Technical description

Next sections provide a general overview of the technical details of the dependency detection tool.


1. Cross-reference detection: HTML file

Uploads one document in HTML format to the server, extracts the cross-references of all the requirements in the document and finally removes the uploaded file.

  • Indexed detection -> the component allows to extract the cross-references of the requirements between N-M indexes in the document.

2. Cross-reference detection: JSON project

Extracts the cross-references of all bugs and requirements of a project stored in an input JSON.

  • Indexed detection -> the component allows to extract the cross-references between N-M indexes of all bugs and requirements of the input JSON.

Used technologies

How to install

The project does not require the addition of external dependencies or additional configuration. It can be built by running:

mvn clean install package

This generates a .jar file.

How to use it

You can take a look at the Swagger documentation here, which includes specific, technical details of the REST API to communicate to the service.

Notes for developers


  • "Jsoup Java HTML Parser, with Best of DOM, CSS, and Jquery." Jsoup Java HTML Parser, with Best of DOM, CSS, and Jquery. Accessed March 11, 2019.

How to contribute

See OpenReq project contribution guidelines


Free use of this software is granted under the terms of the EPL version 2 (EPL2.0)

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