Semiotics of culture is a valuable consideration, as it illuminates indiscernible aspects associated with social practices and processes of signification. Against this background, the goal of this paper is to delineate the cultural and social (contextual) dimensions of written cultural heritage from a semiotic point of view. Hence, an ontology defining a light vocabulary of high-level concepts is developed to describe these contextual dimensions. The proposed ontology, called Onto-Semiotics DCT (Describing the Contextualization of Text), is essentially a general theoretical conceptual model based on the semantic idea that a text penetrates into a communication circuit. This perspective makes a clear distinction between intra-textual and extra-textual semiotic context, as well as cultural micro-situation and social macro-situation. However, in this paper, we focus on the description of the situations that refer to the social and cultural dimensions of a text. Thus, context-aware information representation is applied. This description is crucial for the correct analysis and interpretation of texts, as according to a prevailing semiotic position, texts are influenced by the environment that produces them. As a result, knowing and recording their context reinforces text semantics, through the methodological transition from logo-centrism to culture-centrism, and even further to socio-centrism.