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[skip ci]Fix typo in doc of segcore basic types (#8823) 

Signed-off-by: Jael Gu <mengjia.gu@zilliz.com>
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Jael Gu 2021-09-29 14:38:00 +08:00 committed by GitHub
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docs/design_docs/segcore/basic_types.md
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# Glossary
# Glossary
- `Collection`: Data table, contains multiple Segments
- `Segment`: The memory structure for storing a piece of data supports concurrent insertion, deletion, query, index loading, monitoring and statistics
- `Collection`: Data table containing multiple Segments
- `Segment`: The memory structure of storing a piece of data which supports concurrent insertion, deletion, query, index loading, monitoring and statistics
- `Schema`: Definition of collection data format, including
- `vector<FieldMeta>`, Order list of FieldMeta
- `isAutoId`. if set to True , default primary field is `RowId` and it is auto generated
- `primaryKey` (when `isAutoId = False`), specify primary key field
- `vector<FieldMeta>`: Order list of FieldMeta
- `isAutoId`: if set to True , default primary field is `RowId` and it is auto generated
- `primaryKey`: (when `isAutoId = False`) specify primary key field
- `FieldMeta`: field properties, including
- `DataType` data type, including Int8...Int64, Float, Double, FloatVector, BinaryVector and String later
- `Dim` (when dataType is vector type): vector dimension
- `metric_type` (when dataType is vector type, optional): (when datatype is vector type, optional): the metrictype corresponding to this vector is related to the small batch index and can be empty
- `DataType`: data type, including Int8...Int64, Float, Double, FloatVector, BinaryVector and String later
- `Dim`: (when dataType is vector) type vector dimension
- `metric_type`: (when dataType is vector type, optional) the metric type corresponding to this vector is related to the small batch index and can be empty
- `FieldName`: column name
- `FieldId`: unique number of the column
- (hidden) `FieldOffset`, which is the subscript of `vector<Field>` in the schema. The internal calculation of segcore is basically based on fieldoffset
- `Span` is similar to STD:: span， It supports vector type data and can be implicitly converted to `SpanBase` for interface overwrite
- (hidden) `FieldOffset`: which is the subscript of `vector<Field>` in the schema. The internal calculation of segcore is basically based on fieldoffset
- `Span`: similar to STD::span. It supports vector type of data and can be implicitly converted to `SpanBase` for interface overwrite