 The term artha in Sanskrit is used to denote the notion of meaning. However, the meaning of this term ranges from a real object in the external world referred to by the word to a mere concept of an object which may or may not correspond to anything in the external world. The differences regarding what meaning is are argued out by the philosophical schools of Nyāya, Vaiśeṣika, Mīmāṃsā, various schools of Buddhism, Sanskrit grammar, and poetics. Among these schools, the schools of Nyāya, Vaiśeṣika, and Mīmāṃsā have realist ontologies. Mīmāṃsā focuses mainly on interpreting the Vedic scriptures. Buddhist thinkers generally pointed to language as depicting a false picture of reality. Sanskrit grammarians were more interested in language and communication than in ontology, while Sanskrit poetics focused on the poetic dimensions of meaning.