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The "FS2/Design" page has been changed by brane: http://wiki.apache.org/subversion/FS2/Design?action=diff&rev1=7&rev2=8 [[attachment:vfs-snapshot-sequence.svg|{{attachment:vfs-snapshot-sequence.png}}]] - Nodes are either ''files'', which are containers of unstructured data, or ''directories'', which are lists of named files and directories. The root node of this tree is always a directory. At any point in time during the filesystem's lifetime, each node (except the root) will have exactly one parent. + Nodes are either ''files'', which are containers of unstructured data, or ''directories'', which are lists of named files and directories. The root node of this tree is always a directory. + Within any single revision, each node (except the root) will have exactly one parent. However, successive revision trees are not independent and a node may trace its ''history'' across many revisions. A ''node revision'' is the projection of one ''branch'' of a node's history in a particular revision; it can have at most one ''predecessor'' in an earlier revision and any number of ''successors'' in later revisions. +
