 The relationships between representations on the different levels are considered to be translations or mappings, rather than transformations, and are mediated by sets of rules, called "components", which ensure the appropriate, language-specific transitions between levels.Semantic representations (SemR) in meaning–text theory consist primarily of a web-like semantic structure (SemS) which combines with other semantic-level structures (most notably the semantic-communicative structure [SemCommS], which represents what is commonly referred to as "information structure" in other frameworks).The SemS itself consists of a network of predications, represented as nodes with arrows running from predicate nodes to argument node(s).