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I have a long text like this with many comments to create from a specific text in bold or XML tags:

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

or also I can format like this:

<.XML.>Lorem< /XML.> ipsum dolor sit amet, <.XML>consectetur adipiscing< /XML> elit.

Please how can I convert the text in highlight or bold, or XML tags, etc...

in comments in Google doc using app script?

The final result in Google doc need be like this:
https://photos.app.goo.gl/pUugcKRHupqzZepBA

Thanks so much for read!

Here I find some documentation:

Google Script

Some post

I show you how to convert Adobe InDesign index into Word or Google Doc comments.

1º VIDEO:
https://youtu.be/_M1TaOgCYkU

2º IMAGES GALLERY:
https://photos.app.goo.gl/W2uvndiyujFby1X8A

3º ADOBE INDESIGN SCRIPT :

// Project name: id0000131-convert-index-entries-into-Word-or-Google-Doc-comments
// Github: Adobe Indesign Script examples: https://github.com/firedevelop/id0000013-Adobe-InDesign-Scripts-Examples
// Github of this project: id0000131-convert-adobe-indesign-index-into-Word-or-Google-Doc-comments
// YouTube Playlist: https://www.youtube.com/playlist?list=PLfdbMQ5CoohPqK8ekjthm2fNoGMLwYeFf
// Blog: https://www.firedevelop.com/2018/11/id0000131-convert-index-entries-into.html

// Script Author:
// Peter Kahrel -- www.kahrel.plus.com
// http://www.kahrel.plus.com/indesign/index-to-text.jsx
// http://www.kahrel.plus.com/indesign/index_to_text.html



(function () 

 function addSortOrder (topic) 
 var s = topic.name;
 if (topic.sortOrder !== '') 
 s += '@' + topic.sortOrder;
 
 return s;
 

 function topicPath (topic, str) 
 if (topic.parent.constructor.name == 'Index') 
 return str;
 else 
 return topicPath (topic.parent, addSortOrder (topic.parent) + '#' + str);
 
 

 function main () 
 var i, j;
 var topics;
 var err = false;
 if (app.documents[0].indexes.length === 0) 
 alert ('Document doesn't have an index.');
 exit();
 
 topics = app.documents[0].indexes[0].allTopics;
 for (i = topics.length-1; i >= 0; i--) 
 for (j = topics[i].pageReferences.length-1; j > -1; j--) 
 try 
 topics[i].pageReferences[j].sourceText.contents = '<!-- ' + topicPath (topics[i], addSortOrder (topics[i])) + ' -->';
 //topics[i].pageReferences[j].remove();
 catch (_) 
 err = true;
 
 
 
 if (err) 
 alert ('Some markers could not be converted. Please check the Index panel');
 
 

 main();

());