[02. Elements for expression]
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The meter element is used to express values within a certain range or distribution ratio. For example, it can be used to indicate the current disk usage rate or performance ratio. To express range and value, the meter has the following properties.

• 0 value: Specifies actually measured data
• 0 min: Specifies the minimum value recognized by the meter element.
• 0 max: Specifies the maximum value recognized by the meter element
• 0 low: Specifies the minimum value of the allowable range
• 0 high: Specifies the maximum value of the allowable range
• 0 optimum: Specifies expected value
• 0 title: Tooltip input
  One thing to keep in mind when specifying the value of the value, low, and high properties is that it must be a value between the value of the min property and the value of the max property.