The main class is MXMLData, which represents an entire MXML file.
The content of the file is represented as a list of MXMLUnitData
objects representing MXML units, but there are APIs which allows the
linear list of units to be accessed as a hierarchy of tags that contain other
tags.
There are three types of MXML units:
MXMLInstructionData unit represents a processing instruction
such as <?xml version="1.0" encoding="utf-8"?>.MXMLTagData unit represents an open tag
like <Button>, a close tag like
</Button>, or an empty tag like
<Button/>.
The attributes of an open tag or an empty tag are represented by
MXMLTagAttributeData objects.MXMLTextData unit represents character data such as
regular text, whitespace, a CDATA block, or a comment.