Markup(s) are the information of user's marked tags on text. A markup includes:

• Start position
• Length (End position - Start position)
• Tag name
• Tag category
• Annotation
• Tagged text (automatically retrieved by VTT)

Please notes:

• The tag name and category must be defined in tags
• The start and end position must within the range of the text (0 ~ text.legnth())
• Annotation should not include character '|'. All characters after the first '|' are ignored.

VTT also provides:

• The detail log information of all markups
• A statistics report of all markups categorized by tags
• GUI Dialog box for the selected markup (tagged text) by press m key
• Other markup operations