Access Rights copyrights: the name of the file which contains the copyrights declaration. Conditions: a set of access rights conditions. In case of several conditions, the operator "OR" is used between the conditions. Access Rights condition: each condition can contain one or more expressions. The condition element has one attribute called "negate". This attribute is used to indicate whether the condition is taken as is (negate=false) or as "NOT" condition (negate=true) Access Rights expressions: this element enables building the condition as a set of expressions. Each expression is composed of two elements: key and value/s. The key element specifies the type of permission, i.e., group, IP range, not guest, course enrollment, everyone etc. The expression has two attributes: "negate" and "ar_operation". The negate attribute is used as the logical opertaor "NOT". The operation is used to indicate the relation between the Key and the Value elements, i.e., "eqals" or "within". Value: Holds the value/s of the key parameter. comment: In the case of Key=Custom (for simultaneous use), Value 1 will hold the full class name and Value 2 will hold parameters that passed to the checker Value: Holds the value/s of the key parameter. comment: In the case of Key=Custom (for simultaneous use), Value 1 will hold the full class name and Value 2 will hold parameters that passed to the checker