From XML Retrieval to Semantic Search and Beyond The INEX, SBS, and MC2 Labs of CLEF 2012-2018

INEX ran as an independent evaluation forum for 10 years before it teamed up with CLEF in 2012. Even before 2012 there was considerable collaboration between INEX and CLEF, and these collaborations increased in intensity when CLEF moved beyond its traditional cross-lingual focus in 2009/2010 shifting to include all experimental IR. This led to the merger of CLEF and INEX, and effectively to the inclusion of INEX as a large track or lab into CLEF in 2012. This chapter details the efforts of the INEX lab in CLEF (2012–2014), as well as the ongoing activities as separate labs, under the labels Social Book Search (2015–2016), and Microblog Contextualization (2016–2018).