This paper presents the LQM metadata schema, an extension of the IEEE LOM standard. LQM is capable of registering information related to the quality of virtual education resources. As a complement, we have developed a cataloging and evaluation tool capable of registering LQM metadata and performing the subsequent quality estimation according to UNE 66181:2012. The proposal identifies and describes the dimensions and properties of the LQM element data. The research results show that it is feasible to provide an automatic estimation of quality of digital educational resources using LQM. 
A Learning Quality Metadata approach: Automatic quality assessment of virtual training from metadata