How to identify crescendo and decrescendo in musicXML

[Code-Lonely]

How to identify crescendo and decrescendo in musicXML？
Example：

<direction-type>
 <wedge default-x="11" default-y="-77" color="#000000" type="crescendo" />
</direction-type>

[Danielku15]

I am not sure if I understand your question. This repository is about alphaTab. You can learn more about MusicXML here: https://www.musicxml.com/

If you have some questions that relates to alphaTab, please try to rephrase to make it more clear what you need.