For a large document, sharding may be performed to produce
several document shards. Each document shard contains this field
to detail which shard it is.
Attributes
Name
Description
shard_index
int
The 0-based index of this shard.
shard_count
int
Total number of shards.
text_offset
int
The index of the first character in
Document.text
in the overall document global text.
