USING LEARNING OBJECTS TO CREATE SEMANTICALLY ENRICHED CONTENT TO SHARE KNOWLEDGE AND CREATE COMMUNITIES IN E-LEARNING SYSTEMS - Alvarez-Bermejo, J. A.; Salinas-Castillo, A.; Lapresta-Fernandez, A.; Castillo, E.; Morales, D. P.; Chova, LG; Martinez, AL; Torres, IC (10TH INTERNATIONAL CONFERENCE OF EDUCATION, RESEARCH AND INNOVATION (ICERI2017), 2017)