Negation of clinical named entities is common in clinical documents and is a crucial factor to accurately compile patients' clinical conditions and to further support complex phenotype detection. In 2009, Mayo Clinic released the clinical Text Analysis and Knowledge Extraction System (cTAKES), which includes a negation annotator that identifies negation status of a named entity by searching for...

The problems of the meaning and function of negation are disentangled from ontological issues with which they have been long entangled. TIle question of the function of negation is the crucial issue separating relevant and paraconsistent logics from classical theories. The function is illuminated by considering the inferential role of contradictions, contradiction being parasitic on negation. T...

We study the usage of negation in JSON Schema data modeling. Negation is a logical operator rarely present type systems and schema description languages, since it complicates decision problems: many software tools, but also formal frameworks for working with Schema, do not fully support negation. This motivates us to whether actually used practice, which aims, could—in principle—be replaced by ...