jixuan1989 commented on a change in pull request #2501:
URL: https://github.com/apache/iotdb/pull/2501#discussion_r559108008
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File path: docs/UserGuide/Concept/Data Model and Terminology.md
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@@ -61,6 +61,8 @@ Once a prefix path is set as a storage group, the storage
group settings cannot
After a storage group is set, all parent and child layers of the corresponding
prefix path are not allowed to be set up again (for example, after `root.ln` is
set as the storage group, the root layer and `root.ln.wf01` are not allowed to
be set as storage groups).
+The Layer Name of storage group can only consist of characters, numbers and
underscores, like `root.storagegroup_1`.
Review comment:
Is `Layer Name` a new concept?
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