The array schema file has name __array_schema.tdb and is located here:
my_array # array folder
|_ ....
|_ __array_schema.tdb # array schema file
|_ ...
The array schema file consists of a single generic tile, with the following data:
| Field | Type | Description |
|---|---|---|
| Array version | uint32_t |
Format version number of the array schema |
| Allows dups | bool |
Whether or not the array allows duplicate cells |
| Array type | uint8_t |
Dense or sparse |
| Tile order | uint8_t |
Row or column major |
| Cell order | uint8_t |
Row or column major |
| Capacity | uint64_t |
For sparse fragments, the data tile capacity |
| Coords filters | Filter Pipeline | The filter pipeline used as default for coordinate tiles |
| Offsets filters | Filter Pipeline | The filter pipeline used for cell var-len offset tiles |
| Domain | Domain | The array domain |
| Num attributes | uint32_t |
Number of attributes in the array |
| Attribute 1 | Attribute | First attribute |
| … | … | … |
| Attribute N | Attribute | Nth attribute |
The domain has internal format:
| Field | Type | Description |
|---|---|---|
| Num dimensions | uint32_t |
Dimensionality/rank of the domain |
| Dimension 1 | Dimension | First dimension |
| … | … | … |
| Dimension N | Dimension | Nth dimension |
The dimension has internal format:
| Field | Type | Description |
|---|---|---|
| Dimension name length | uint32_t |
Number of characters in dimension name |
| Dimension name | char[] |
Dimension name character array |
| Dimension datatype | uint8_t |
Datatype of the coordinate values |
| Cell val num | uint32_t |
Number of coordinate values per cell. For variable-length dimensions, this is std::numeric_limits<uint32_t>::max() |
| Filters | Filter Pipeline | The filter pipeline used on coordinate value tiles |
| Domain size | uint64_t[] |
The domain size in bytes |
| Domain | uint8_t[] |
Byte array of length equal to domain size above, storing the min, max values of the dimension. |
| Null tile extent | uint8_t |
1 if the dimension has a null tile extent, else 0. |
| Tile extent | uint8_t[] |
Byte array of length equal to the dimension datatype size, storing the space tile extent of this dimension. |
The attribute has internal format:
| Field | Type | Description |
|---|---|---|
| Attribute name length | uint32_t |
Number of characters in attribute name |
| Attribute name | char[] |
Attribute name character array |
| Attribute datatype | uint8_t |
Datatype of the attribute values |
| Cell val num | uint32_t |
Number of attribute values per cell. For variable-length attributes, this is std::numeric_limits<uint32_t>::max() |
| Filters | Filter Pipeline | The filter pipeline used on attribute value tiles |