recommender systems based on web technology.- social web applications.- web applications modelling and engineering.- web big data and web data analytics.- web mining and knowledge extraction.- web security and privacy.- web user interfaces.- web mining and knowledge extraction.- web Big Data and Web data analytics.- Mobile Web applications.- web of Things applications.- social Web applications.- web crowdsourcing and human computation.- semantic web.- web ontologies, and Linked Open Data applications.- quality and accessibility aspects of Web applications.- web composition and mashups.- web user interfaces.- web security and privacy.- web programming.- web services, computing, and standards.