Hi Arturo Vazquez Rodriguez ,

I did not try this myself but in the Trados Batch Anonymizer there is an example in the CommentVisitor where they change the author in an ICommentMarker.
The visitor is used in the UserNameService class.
An ICommentMarker has ICommentProperties which you should be able to use to retrieve and edit the IComments.
They do this inside a batch task.

I am not sure about this but if you don't want to use a visitor and already have your ISegmentPair / target ISegment, you should be able to filter the sub elements you get with target.AllSubItems and check if it is a ICommentMarker.

As far as i know if you do not want to use the editor you must do your changes inside of an AbstractBilingualContentProcessors ProcessParagraphUnit method so that the changes are saved. In the Anonymizer example you can see this in the AnonymizerProcessor. Be sure to call base.ProcessParagraphUnit(paragraphUnit); in the ProcessParagraphUnit method of the AbstractBilingualContentProcessor. Otherwise your changes will not be saved (or it will just delete all the segments in your file. Ask me how i know)

You need a way to get the IParagraphUnit into the AbstractBilingualContentProcessor. If you are doing this inside of a batch task it does this automatically for you.
There are probably other ways where you can get these given to you by Studio but if you want to do this manually you need to load the sdlxliff file and process the AbstractBilingualContentProcessor.

You can do this by getting an IFileTypeManager via the DefaultFileTypeManager. 

var fTm = DefaultFileTypeManager.CreateInstance(true);

IMultiFileConverter converter = ftm.GetConverterToDefaultBilingual(PATH_TO_SDLXLIFF_FILE, PATH_TO_SDLXLIFF_FILE, null); //first path is input, second path is output file

converter.AddBilingualProcessor(collector);

converter.Parse()

Hi Lukas,

Thanks for your detailed answer!

It turns out that it was easier than expected and I was missing something very important that isn't part of the Visual Studio template of the plugin...

Please make sure you override OnFileComplete() method in your application. If you don't override this method your changes on the file will not be saved.

var comment = CreateCommentContainer("Comment content", "Comment author", Severity.Low, DateTime.Now, "1");
segmentPair.Target.MoveAllItemsTo(comment as IAbstractMarkupDataContainer);
segmentPair.Target.Add(comment as IAbstractMarkupData);

private IAbstractMarkupData CreateCommentContainer(string text, string author, Severity severity, DateTime dateTime, string version)
{
var comment = PropertiesFactory.CreateComment(text, author, severity);
comment.Date = dateTime;
comment.Version = version;

var commentProperties = PropertiesFactory.CreateCommentProperties();
commentProperties.Add(comment);
var commentMarker = ItemFactory.CreateCommentMarker(commentProperties);

return commentMarker;
}