Note that strings must be quoted for field values in line protocol.

In [line protocol reference](https://docs.influxdata.com/influxdb/v2.4/reference/syntax/line-protocol/) and data elements reference, note that strings must be (double?) quoted. Is this really a schema requirement or also required for valid line protocol?

Start with the linked line protocol reference and the data elements reference. Verify whether double quotes are required for valid line protocol or only for the schema, then update both references with the distinction; done means the requirement is explicit and unambiguous.

Written by the indexing model from the issue text.