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[1] ajaxkeys.js : /usr/share/cloudstack-common/systemvm/js/
[2] ajaxkviewer ajaxviewer.js : /usr/share/cloudstack-common/systemvm/js/
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Conditional mapping entries can be defined on the conditions which are mentioned in glossary conditional mapping entry.
Ideally we should not be touching this file but sometime situation arises that something is missing then we need to modify this file.
ajaxviewer.js manipulates conditional mapping entries defined in ajaxkeys.js and creates mapping table for translation.
Situation like you need one more condition to make life easy for you.
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