| $Attribute | | Defines an attribute in an object body
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| $AttrXRef | | Defines a cross reference attribute in an object body
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| $Buffer | | Defines a buffer attribute in an object body
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| $ClassDef | | Defines a class
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| $ClassHier | | Root object of a class description tree
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| $GraphPlcNode | | Defines plc properties for a plc function object class
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| $Input | | Defines an input pin on a plc function object
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| $Intern | | Defines an intern attribute in a plc function object
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| $ObjBodyDef | | Defines a object body, RtBody or DevBody
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| $Output | | Defines an output pin on a plc function object
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| PlcTemplate | | Contains the code for a plc function object with plc code
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