2.2.1.5.1 16-bit Stream Object Header Start
A 16-bit header for either a single or a start of a compound object has the following format.
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2 |
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A |
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Type |
Length |
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A - Header Type (2-bit): A flag that specifies a 16-bit stream object start. This MUST be set to 0x0.
B - Compound (1-bit): If set, a bit that specifies a compound parse type is needed, and MUST end with either an 8-bit Stream Object Header end (section 2.2.1.5.3) or a 16-bit Stream Object Header end (section 2.2.1.5.4). If the bit is not set, it specifies a single object.
Type (6-bits): A 6-bit unsigned integer that specifies the stream object type (see the following table for possible values).
Length (7-bits): A 7-bit unsigned integer that specifies the length in bytes for additional data (if any) before the next Stream Object Header start or Stream Object Header end. If the length is more than 127 bytes, a 32-bit Stream Object Header start (section 2.2.1.5.2) MUST be used.
The following table lists the possible stream object types, and the corresponding Compound value:
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Stream object type |
Value |
Compound |
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Data Element |
0x01 |
1 |
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Object Data BLOB |
0x02 |
0 |
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Object Group Object Excluded Data |
0x03 |
0 |
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Waterline Knowledge Entry (section 2.2.1.13.4.1) |
0x04 |
0 |
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Object Group Object Data BLOB Declaration |
0x05 |
0 |
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Data Element Hash |
0x06 |
0 |
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Storage Manifest root declare |
0x07 |
0 |
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Revision Manifest root declare |
0x0A |
0 |
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Cell Manifest current revision |
0x0B |
0 |
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Storage Manifest schema GUID |
0x0C |
0 |
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Storage Index Revision Mapping |
0x0D |
0 |
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Storage Index Cell Mapping |
0x0E |
0 |
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Cell Knowledge Range (section 2.2.1.13.2.1) |
0x0F |
0 |
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Knowledge (section 2.2.1.13) |
0x10 |
1 |
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Storage Index Manifest Mapping |
0x11 |
0 |
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Cell Knowledge (section 2.2.1.13.2) |
0x14 |
1 |
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Data Element Package |
0x15 |
1 |
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Object Group Object Data |
0x16 |
0 |
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Cell Knowledge Entry (section 2.2.1.13.2.2) |
0x17 |
0 |
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Object Group Object Declare |
0x18 |
0 |
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Revision Manifest Object Group references |
0x19 |
0 |
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Revision Manifest |
0x1A |
0 |
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Object Group Object Data BLOB reference |
0x1C |
0 |
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Object Group Declarations |
0x1D |
1 |
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Object Group Data |
0x1E |
1 |
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Waterline Knowledge (section 2.2.1.13.4) |
0x29 |
1 |
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Content Tag Knowledge (section 2.2.1.13.5) |
0x2D |
1 |
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Content Tag Knowledge Entry |
0x2E |
0 |
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Query Changes Versioning |
0x30 |
0 |