Identifying SSML-enhanced text - Amazon Polly
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Identifying SSML-enhanced text

<speak>

This tag is supported by generative, long-form, neural, and standard TTS formats.

The <speak> tag is the root element of all Amazon Polly SSML text. All SSML-enhanced text must be enclosed within a pair of <speak> tags. 

<speak>Mary had a little lamb.</speak>