/**
 * Copyright 2017 Pivotal Software, Inc.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.micrometer.core.instrument;

/**
 * A description of the value contained in a measurement.
 *
 * @author Jon Schneider
 */
public enum Statistic {
    /**
     * The sum of the amounts recorded.
     */
    TOTAL("total"),

    /**
     * The sum of the times recorded. Always reported in nanoseconds.
     */
    TOTAL_TIME("totalTime"),

    /**
     * Rate per second for calls.
     */
    COUNT("count"),

    /**
     * The maximum amount recorded. When this represents a time, it is always reported in nanoseconds.
     */
    MAX("max"),

    /**
     * Instantaneous value, such as those reported by gauges.
     **/
    VALUE("value"),

    /**
     * Undetermined.
     */
    UNKNOWN("unknown"),

    /**
     * Number of currently active tasks for a long task timer.
     */
    ACTIVE_TASKS("activeTasks"),

    /**
     * Duration of a running task in a long task timer. Always reported in nanoseconds.
     */
    DURATION("duration");

    private final String tagValueRepresentation;

    Statistic(String tagValueRepresentation) {
        this.tagValueRepresentation = tagValueRepresentation;
    }

    public String getTagValueRepresentation() {
        return tagValueRepresentation;
    }
}

@@ -889,24 +889,17 @@
 corded. 
-Always r
+R
 eported 
@@ -897,36 +897,65 @@
 Reported in 
-nanoseconds.
+the monitoring system's base unit of time
 %0A     */%0A   
@@ -1135,15 +1135,8 @@
  is 
-always 
 repo
@@ -1139,35 +1139,65 @@
 reported in 
-nanoseconds
+the monitoring system's base unit of time
 .%0A     */%0A  
@@ -1573,19 +1573,49 @@
  in 
-nanoseconds
+the monitoring system's base unit of time
 .%0A  

Fix javadoc on time units in Statistic