# Translations with OpenTelemetry 1.0.0 format in CloudWatch
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CloudWatch performs some transformations to put CloudWatch data into OpenTelemetry format.

**Translating namespace, metric name, and dimensions**

These attributes are key-value pairs encoded in the mapping.
+ One attribute has the key `Namespace` and its value is the namespace of the metric
+ One attribute has the key `MetricName` and its value is the name of the metric
+ One pair has the key `Dimensions` and its value is a nested list of key-value pairs. Each pair in this list maps to a CloudWatch metric dimension, where the pair's key is the name of the dimension and its value is the value of the dimension.

**Translating Average, Sum, SampleCount, Min and Max**

The Summary datapoint enables CloudWatch to export all of these statistics using one datapoint.
+ `startTimeUnixNano` contains the CloudWatch `startTime`
+ `timeUnixNano` contains the CloudWatch `endTime`
+ `sum` contains the Sum statistic.
+ `count` contains the SampleCount statistic.
+ `quantile_values` contains two `valueAtQuantile.value` objects:
  + `valueAtQuantile.quantile = 0.0` with `valueAtQuantile.value = {{Min value}}`
  + `valueAtQuantile.quantile = 0.99` with `valueAtQuantile.value = {{p99 value}}`
  + `valueAtQuantile.quantile = 0.999` with `valueAtQuantile.value = {{p99.9 value}}`
  + `valueAtQuantile.quantile = 1.0` with `valueAtQuantile.value = {{Max value}}`

Resources that consume the metric stream can calculate the Average statistic as **Sum/SampleCount**.

**Translating units**

CloudWatch units are mapped to the case-sensitive variant of the Unified code for Units of Measure, as shown in the following table. For more information, see [The Unified Code For Units of Measure](https://ucum.org/ucum.html).


| CloudWatch | OpenTelemetry | 
| --- | --- | 
| Second | s | 
| Second or Seconds | s | 
| Microseconds | us | 
| Milliseconds | ms | 
| Bytes | By | 
| Kilobytes | kBy | 
| Megabytes | MBy | 
| Gigabytes | GBy | 
| Terabytes | TBy | 
| Bits | bit | 
| Kilobits | kbit | 
| Megabits | MBit | 
| Gigabits | GBit | 
| Terabits | Tbit | 
| Percent | % | 
| Count | {Count} | 
| None | 1 | 

Units that are combined with a slash are mapped by applying the OpenTelemetry conversion of both the units. For example, Bytes/Second is mapped to By/s.