Alternatives for Open Access publishing for Language, Data and Knowledge Conference ?

Hi all,

we are planning a conference http://2019.ldk-conf.org/ and are looking 
into Open Access publishing.

We would also self-publish (as it is cheaper and we can add some cool 
features), however, the main requirements are that the papers get 
indexed by as many systems as possible, Google Scholar and Microsoft 
Academic being the webby crawlers and then of course the downward 
compatible systems like Thomson Reuters, Scopus, DBLP, etc.

Does anybody know a working alternative? Ideally, some proceedings that 
are self-published and indexed or an alternative publication system.

-- 
All the best,
Sebastian Hellmann

Director of Knowledge Integration and Linked Data Technologies (KILT) 
Competence Center
at the Institute for Applied Informatics (InfAI) at Leipzig University
Executive Director of the DBpedia Association
Projects: http://dbpedia.org, http://nlp2rdf.org, 
http://linguistics.okfn.org, https://www.w3.org/community/ld4lt 
<http://www.w3.org/community/ld4lt>
Homepage: http://aksw.org/SebastianHellmann
Research Group: http://aksw.org