The name of the tag, for example: "projects/p1/locations/us-central1/repositories/repo1/packages/pkg1/tags/tag1". If the package part contains slashes, the slashes are escaped. The tag part can only have characters in a-zA-Z0-9\-._~:@, anything else must be URL encoded.
The name of the version the tag refers to, for example: "projects/p1/locations/us-central1/repositories/repo1/packages/pkg1/versions/sha256:5243811" If the package or version ID parts contain slashes, the slashes are escaped.