JastAdd declarative aspect
File type: Various data file
A .jrag file is a JastAdd source file that contains a declarative aspect specification.
JastAdd processes the file as part of a Java-based software project, rather than treating it as a standalone data document.
File type category:
Various data file
Date updated: October 5, 2026
JastAdd is a meta-compilation system written for the Java runtime environment and available on various platforms. It is used to extend and generate Java-based programs. A .jrag file contains declarative aspect data that describes additions or changes to the software model being built.
The file is source input for the JastAdd toolchain. It is commonly used with other JastAdd project files, such as abstract syntax tree definitions and Java source files. JastAdd processes these inputs and generates Java source code for the resulting application or compiler.
The format remains part of the JastAdd development workflow and can be used on platforms that support the JastAdd Java-based tools.
A .jrag file is normally opened as text. Use the JastAdd development toolchain to process it within the project that contains it. A programming text editor can be used to inspect or edit the declarative aspect source.
Because the file is source input rather than a standalone document, opening it directly does not display the completed application or compiler.
There is no general-purpose conversion from a .jrag file to another document format. JastAdd processes the file as part of a project and generates Java source code and other build output.
To obtain usable output, run the relevant JastAdd build or generation process. The generated files are derived build results and are not a direct replacement for the original declarative aspect source.
Software applications that handle other tasks involving jrag files:
Multiplatform
Language
