The attribute context editor contains two editors (see Figure 5). The left one contains the context's variables and the right its application conditions. Each one has a little text area for messages like the current attribute editor has. Variables as well as conditions can be moved up and down in there tuples but cannot be made invisible. The variable editor additionally has two more columns prepended. IN is a switch for the variables parameter property. If it is checked the variable in that line is an input parameter. OUT switch is not jet supported. At the bottom, the buttons of these editors are a subset of those occurring the current attribute editor. Figure 5 shows those variable declarations and attribute conditions defined for rule expand in Figure 24).
