In OTX describes the visibility, whether elements such as

• Prozedur,
• Signature
• Global Constant
• Kontext-Variable
• Validity

can be used in other documents or not. There are three levels of visibility:

• Private

  The corresponding element can be used only within the same document. It is thus invisible to other OTX documents.

• Package

  The corresponding element can only be used in documents within the same package. It is thus OTX documents outside the current package invisible.

• Public

  The corresponding element can be used by any document. Thus, it is visible to all OTX documents.

Global variables always have the visibility of "private", so may not be used in other documents!