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We have the pleasure to announce the presence of Ondřej Košarko for the Winter School Session 04 Evaluation, acknowledgement and credit circulation and the Session 05 about Persistent identification&#160;BiographyOndřej Košarko is a programmer working at the Institute of Formal and Applied Linguistics (UFAL), Prague, Czech Republic. He is one of the developers behind LINDAT/CLARIN repository. The repository is based on DSpace and has been modified to meet the needs of CLARIN centers. This modified version is now deployed in several member institutions.He is also responsible for parts of shortref.org, a tool to ease persistent data citation, and various other bits and pieces like this guide for choosing the adequate licence.&#160;Abstract of Session 04 Persistent identificationThe proliferation of datasets and services available online invites researchers to link them from their works. A link to a service, that makes it possible to explore the data in question yourself, might be more valuable than a picture. But these types of online resources and/or the infrastructures they live in are constantly evolving. Which effectively leads to dead links or links to a different version of the resource. PID systems can help with keeping the locations of resources up to date as well as store information about what the resource is.&#160;Abstract of Session 05 Evaluation, acknowledgement and credit circulationSimplifying license selection: The necessity to share and preserve data and software is becoming more and more important. Without the data and the software, research cannot be reproduced and tested by the scientific community. Making data and software simply reusable and legally unequivocal requires choosing a license for data and software which is not a trivial task.&#160;Selected bibliographyHis publications and collaborations are related to projects he has been developing: http://ufal.mff.cuni.cz/biblio/?section=author&#38;id=4228648225228326600&#38;mode=view.&#160;Further readingsPersistent and unique Identifiers: http://hdl.handle.net/1839/00-DOCS.CLARIN.EU-30Persistent Identifier Service: http://www.clarin.eu/sites/default/files/pid-CLARIN-ShortGuide.pdfThe DOI® Handbook: https://dx.doi.org/10.1000/182Handle related readings: http://www.handle.net/archive.htmlPersistent identifiers for eResearch: http://www.pidconsortium.eu/Data Citation Synthesis Group: Joint Declaration of Data Citation Principles. Martone M. (ed.) San Diego CA: FORCE11; 2014 [https://www.force11.org/group/joint-declaration-data-citation-principles-final].&#160;Find the full Winter School bibliography on Zotero