From Arlington Patch:
Elected officials gave their blessing Saturday to using the General Public License for website source code developed by the county, according to a news release. Arlington is one of the first local governments in Virginia to share its code with the open-source community, the release states.
"The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change all versions of a program—to make sure it remains free software for all its users," according to the license preamble.