Oxygen XML Author Eclipse plugin includes a Character Map for inserting special characters. It can also be used to find the decimal, hexadecimal, or character entity equivalent for a particular character or symbol.
Symbols drop-down button so you can
easily insert any of those characters by simply selecting it from the
drop-down.You can see the hexadecimal value for any character that is already inserted in your document by placing the cursor right after the character and you can see its value in the status bar at the bottom of the application.
You can see the character or code that will be inserted in Text mode next to the selections in this section and a box on the right side of the dialog box allows you to see the character that will be inserted in Author mode. You can also see the name and range name of a character either at the bottom of the dialog box, or in a tooltip when hovering the cursor over the character.