wu-sheng commented on code in PR #615:
URL: 
https://github.com/apache/skywalking-banyandb/pull/615#discussion_r1968622115


##########
docs/concept/tsdb.md:
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@@ -2,9 +2,9 @@
 
 TSDB is a time-series storage engine designed to store and query large volumes 
of time-series data. One of the key features of TSDB is its ability to 
automatically manage data storage over time, optimize performance and ensure 
that the system can scale to handle large workloads. TSDB empowers `Measure` 
and `Stream` relevant data.
 
-In TSDB, the data in a group is partitioned base on the time range of the 
data. The segment size is determined by the `segment_interval` of a group. The 
number of segments in a group is determined by the `ttl` of a group. A new 
segment is created when the written data exceeds the time range of the current 
segment. The expired segment will be deleted after the `ttl` of the group.
+In TSDB, the data in a group is partitioned based on the time range of the 
data. The segment size is determined by the `segment_interval` of a group. The 
number of segments in a group is determined by the `ttl` of a group. A new 
segment is created when the written data exceeds the time range of the current 
segment. The expired segment will be deleted after the `ttl` of the group.
 
-More than the time series data model, TSDB also provides a schema-less data 
type, `Property`. The `Property` data type is used to store the document which 
contains several tags. The `Property` data is separate group which only 
contains `shard`.
+More than the time series data model, TSDB also provides a schema-less and 
non-time-series data type, `Property`. The `Property` data type is used to 
store the document which contains several tags. The `Property` data is an 
independent group that contains only `shard`s, without `segment_interval`, 
`ttl`, or other time-series-related features.

Review Comment:
   @hanahmily I'm trying to make the intro part more clear about property. 
Please review whether I added the correct part to explain the original `only 
contains`.



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