/*****************************************************************************
- * RRDtool 1.7.2 Copyright by Tobi Oetiker, 1997-2019
+ * RRDtool 1.8.0 Copyright by Tobi Oetiker, 1997-2022
*****************************************************************************
* rrd_format.h RRD Database Format header
*****************************************************************************/
* ds - Data Source (ds) providing input to the database. A Data Source (ds)
* can be a traffic counter, a temperature, the number of users logged
* into a system. The rrd database format can handle the input of
- * several Data Sources (ds) in a singe database.
+ * several Data Sources (ds) in a single database.
*
* dst - Data Source Type (dst). The Data Source Type (dst) defines the rules
* applied to Build Primary Data Points from the input provided by the