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Clarify extra / must_understand language #317

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10 changes: 3 additions & 7 deletions docs/v3/core/v3.0.rst
Original file line number Diff line number Diff line change
Expand Up @@ -685,8 +685,6 @@ The following members are optional:
same dimension name across multiple arrays within the same Zarr hierarchy,
but extensions or specific applications may do so.

The array metadata object must not contain any other names.
Those are reserved for future versions of this specification.
An implementation must fail to open Zarr hierarchies, groups
or arrays with unknown metadata fields, with the exception of
objects with a ``"must_understand": false`` key-value pair.
Expand Down Expand Up @@ -814,11 +812,9 @@ For example, the JSON document below defines a group::
}
}

The group metadata object must not contain any other names. Those are reserved
for future versions of this specification. An implementation must fail to open
zarr hierarchies or groups with unknown metadata fields, with the exception of
objects with a ``"must_understand": false`` key-value pair.

An implementation must fail to open zarr hierarchies or groups with unknown
metadata fields, with the exception of objects with a ``"must_understand":
false`` key-value pair.

Node names
==========
Expand Down