How to change the writing direction through DOM/Script

[BrianLam2022]

I'm trying to understand the DOM, but I don't know how to do it.
Since I just want to change the writing direction of the textbox from vertical to horizontal via DOM/Script, I know it's possible to use the Indesign feature manually, but how can I do this using the DOM/Script, since I can't see it under the textbox this property? Would you mind telling me how to apply this property?

[Dirk Becker · Accepted solution]

IDML and related formats are based on the scripting DOM, with very few additions.

For your case IDMS should be sufficient. Drag the frame to the Desktop producing snippets before and after the manual change, then diff the snippet files (simple XML).

[BrianLam2022]

That's what I thought! Thank you Dirk. 

[琥珀 猫太郎]

Please use it as a reference.

解決済み: ExtendScriptでストーリーの組方向を変える - Adobe Support Community - 13142468

See also Japanese DOM, not English DOM

http://indesign.cs5.xyz/dom/StoryPreference.html