From manual to semi-automatic semantic annotation: about ontology-based text annotation tools

Semantic Annotation is a basic technology for intelli-
gent content and is beneficial in a wide range of content-
oriented intelligent applications. In this paper we present
our work in ontology-based semantic annotation, which
is embedded in a scenario of a knowledge portal appli-
cation. Starting with seemingly good and bad manual
semantic annotation, we describe our experiences made
within the KA -initiative. The experiences gave us the
starting point for developing an ergonomic and knowl-
edge base-supported annotation tool. Furthermore, the
annotation tool described are currently extended with
mechanisms for semi-automatic information-extraction
based annotation. Supporting the evolving nature of
semantic content we additionally describe our idea of
evolving ontologies supporting semantic annotation.