2.1.1372 Part 4 Section 5.1.10.20, cont (Effect Container)
a. The standard states that the name attribute specifies an optional name for this list of effects.
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In Office, the name attribute specifies an optional name for the container. This name can be used by an effect ["[ECMA-376] Part 4 §4; PresentationML Reference Material" within the same top level container. The name must be unique throughout the top level effect container.