$ pgpk -a KEYS $ pgpv deltaspike-project-1.9.4-source-release.zip.asc
v1.9.4
The minimum JavaEE version is JavaEE 6.
The minmium Java version until DeltaSpike-1.8.x is Java 6. The minimum Java version from DeltaSpike-1.9.0 upwards is Java8.
Details are available here.
See Release-Archive
It is essential that you verify the integrity of any downloaded files using the PGP or MD5 signatures. For more information on signing artifacts and why we do it, check out the Release Signing FAQ.
The PGP signatures can be verified using PGP or GPG. First download the KEYS as well as the asc signature file for the artifact. Make sure you get these files from the main distribution directory, rather than from a mirror. Then verify the signatures using e.g.:
$ pgpk -a KEYS $ pgpv deltaspike-project-1.9.4-source-release.zip.asc
or
$ pgp -ka KEYS $ pgp deltaspike-project-1.9.4-source-release.zip.asc
or
$ gpg --import KEYS $ gpg --verify deltaspike-project-1.9.4-source-release.zip.asc deltaspike-project-1.9.4-source-release.zip
More information can be found at the ASF Checking Signatures page