Update README.md

README.md

@@ -42,8 +42,8 @@ JSON-like diagnostic profile message record for time series, with example data.
  "agent":"d303aea7-3604-46c5-84c9-ad2758fb2852" // agent v4 RFC 4122 UUID e.g., see https://https://uuidgen.org/v/4, as string, mandatory
  "agent-tx-timestamp":"1586485743" // agent transmission GMT time, unix UTC-timestamp, as string, mandatory
  "agent-tx-tz":"+0100" // agent timezone, string concatenation of "+" or "-" with "hhmm" time format, excluding daylight saving time, as string, mandatory
- "tx-timestamp":"1586483743" // profile message update timestamp of GMT time, unix UTC-timestamp, as string, optional 
- "tx_tz":"+0100" // profile message update of timezone, string concatenation of "+" or "-" with "hhmm" time format, excluding daylight saving time, as string, optional 
+ "tx-timestamp":"1586483743" // profile timestamp of GMT time, unix UTC-timestamp, as string, optional 
+ "tx_tz":"+0100" // profile timezone, string concatenation of "+" or "-" with "hhmm" time format, excluding daylight saving time, as string, optional 
  "gps-lat:"46.9465" // GPS latitude, float value, as string, optional
  "gps-long":"7.4443" // GPS longitude, float value, as string, optional
  "gps-prec":"50" // GPS precision in meters, integer as string, optional