The structure indicator is a key that defines the allowed characters and the hierarchy levels of the functional location structure. It consists of an edit mask and a hierarchy indicator. The edit mask defines the allowed characters for each position of the functional location identification. The hierarchy indicator defines the hierarchy levels of the functional location structure and the number of characters for each level. For example, a structure indicatorwith the edit mask ANNNN-NNNN and the hierarchy indicator 5-4 means that the functional location identification can have up to 9 alphanumeric characters, divided into two levels with 5 and
4 characters respectively, separated by a hyphen. The structure indicator does not limit the types of characters to alpha and numeric, as it can also include special characters, such as hyphens, slashes, or dots. Therefore, answer A is incorrect. The structure indicator also does not restrict the number of hierarchical levels to no more than 6, as it can have up to 10 levels. Therefore, answer B is also incorrect. References: Explaining Technical Asset Structures - SAP Learning and Organizational Elements and Structures | SAP Help Portal.