The visual representation of the field needs to be coded within the appropriate read subscene subform, and the edit mode representation needs to be coded within the edit subscene subform.
需要在合适的读子场景子表单中对字段的可视化表示进行编码，在编辑子场景子表单中对编辑模式表示进行编码。
This form can be printed to read the barcode, and it can generate the coded data into other systems for data processing.
可以打印该表单以读取条形码，该表单还可以在其他系统中生成代码数据以进行数据处理。
Events are associated with the XML document being read, so SAX is coded in callbacks.
事件与读入的 XML 文档相关联，因此 SAX 以回调的方式编码。
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