2.1.388 Part 1 Section 16.27.2, number:number-style
a. The standard defines the element <number:number-style>
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This element is not supported in Word 2013, Word 2016, or Word 2019.
b. The standard defines the attribute style:name, contained within the element <number:number-style>
c. The standard defines the element <number:number-style>
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This element is not supported in PowerPoint 2013, PowerPoint 2016, or PowerPoint 2019.