2.2.2.1.3.1.7 Hierarchy Filter
The Hierarchy filter specifies a filter that matches any data element connected to the data element sub-graph whose root is the specified Storage Index key up to a specified depth.
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Query Changes Filter Hierarchy |
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Depth |
Count (variable) |
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Root Index Key Byte Array (variable) |
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Query Changes Filter Hierarchy (4 bytes): A 32-bit Stream Object Header (section 2.2.1.5.2) that specifies a Query Changes filter hierarchy.
Depth (1 byte): An unsigned integer that specifies the depth of the sub-graph and MUST be one of the following values.
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Value |
Meaning |
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0 |
Index values corresponding to the specified keys only. |
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1 |
First data elements referenced by the Storage Index values corresponding to the specified keys only. |
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2 |
Single level. All data elements under the sub-graphs rooted by the specified keys stopping at any Storage Index entries. |
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3 |
Deep. All data elements and Storage Index entries under the sub-graphs rooted by the specified keys. |
Count (variable): A compact unsigned 64-bit integer (section 2.2.1.1) that specifies the count of bytes in the Root Index Key Byte Array.
Root Index Key Byte Array (variable): A byte array that specifies the root index key. The root index key MUST be a 40-byte array representing two Extended GUIDs that specify a Cell Manifest identifier, a 20-byte array representing an Extended GUID that specifies a Revision Manifest identifier or an Extended GUID that specifies the root Storage Manifest.