Update documentation

KEYWORDS/KEYWORDS_DOCUMENTATION.md

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 ## Introduction
 
-In order to ensure the best searchability and future retrieval of our data as well as their proper presentation, we have developed a taxonomy system comprising all concepts relevant to NLS-specific research. Following the principles of Open Data and Open Science we have based our taxonomy on existing controlled vocabularies such us [DHA Taxonomy](https://vocabs.acdh.oeaw.ac.at/en/) for Digital Humanities created by the [Austrian Centre for Digital Humanities and Cultural Heritage (ACDH-CH)](https://www.oeaw.ac.at/acdh/) and [TaDiRAH](https://de.dariah.eu/tadirah), a joint project of [DiRT](http://dirtdirectory.org/) and [DARIAH-DE](https://de.dariah.eu/). This document provides a list of all keywords used in our project and, if available, links to the vocabulary information on website of DHA Taxonomy.
+In order to ensure the best searchability and future retrieval of our data as well as their proper presentation, we have developed a taxonomy system comprising all concepts relevant to NLS-specific research. Following the principles of Open Data and Open Science we have based our taxonomy on existing controlled vocabularies such as [DHA Taxonomy](https://vocabs.acdh.oeaw.ac.at/en/) for Digital Humanities created by the [Austrian Centre for Digital Humanities and Cultural Heritage (ACDH-CH)](https://www.oeaw.ac.at/acdh/) and [TaDiRAH](https://de.dariah.eu/tadirah), a joint project of [DiRT](http://dirtdirectory.org/) and [DARIAH-DE](https://de.dariah.eu/). This document provides a list of all keywords used in our project and, if available, links to the vocabulary information on website of DHA Taxonomy.
 
 Keywords should provide a general information about the discipline, topic, methodology, resources and results of a given project. To this end each project should, if possible, contain at least one keyword for each category: