[yocto] why is "package-management" defined as a PACKAGE_GROUP?

[Robert P. J. Day]

  think i may have asked this once upon a time, but why, in
core-image.bbclass, is there the line:

  PACKAGE_GROUP_package-management = "${ROOTFS_PKGMANAGE}"

as i read it, package-management doesn't represent an actual package
group, but rather represents one of a number of IMAGE_FEATURES that
are processed explicitly in a .bbclass file, like "debug-tweaks" or
"read-only-rootfs". so what does the above line mean?

rday

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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