另外一个障碍是，action script 3.0不支持完全面向对象的编码环境。
Another obstacle for us was that action script 3.0 does not support a totally object oriented coding environment.
在系统的知识库构建上，采用面向对象的编码规则对知识进行表示和存储，建立了功能模式库、壳体库和方案库。
The function mode storehouse, shell storehouse and scheme storehouse are founded to express and store the knowledge by the Object-Oriented code rule during the construction of systemic repository.
SAX 编码很令人痛苦，回调不是很符合面向对象的思路，熟练掌握它又需要花很长的时间。
SAX is a pain to code in; callbacks aren't very OO, and it takes a long time to get good at it.
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