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ARROW-324: Update arrow metadata diagram #161

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ARROW-324: Update arrow metadata diagram #161

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10 changes: 10 additions & 0 deletions format/Metadata.md
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Original file line number Diff line number Diff line change
Expand Up @@ -46,7 +46,17 @@ table Field {
name: string;
nullable: bool;
type: Type;
// present only if the field is dictionary encoded
// will point to a dictionary provided by a DictionaryBatch message
dictionary: long;
// children apply only to Nested data types like Struct, List and Union
children: [Field];
/// layout of buffers produced for this type (as derived from the Type)
/// does not include children
/// each recordbatch will return instances of those Buffers.
layout: [ VectorLayout ];
// User-defined metadata
custom_metadata: [ KeyValue ];
}
```

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