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JSR: Specification for evaluation versus Specification for building implementation

Can anyone explain what the difference between the two is: Specification for evaluation vs Specification for building an implementation for any available JSR process, for example JSR 299 .

Sometimes this is a valuable source of information, but for me as a developer, which I have to download and read? What annoys a lot is that sometimes the two are the same.

Any thoughts?

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The difference is the license you accept before downloading the spec. I am surprised that you did not notice this by carefully studying each document! For the JSR that I checked, the documents are identical, including the implementation license enclosed in the document.

The evaluation link offers a "Limited Evaluation License" to evaluate the specification. I think this is for JCP members, public commentators and application developers who want to understand the spec.

The implementation link provides a license to the performers. They get a license without royalties to distribute implementations under certain conditions. Paraphrasing freely, these requirements include: that the implementation fully implements the specification, that the implementation does not change the java package namespace that goes beyond the specification, and that the implementation passes the applicable TCK.

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