xAPI xapi lrs veracity learning analyze analysis data Veracity Learning LRS.io LRS versions xAPI xapi statements xapi best practices xapi planning learning analytics LRS dashbaords effectiveness dashboards xapi 101 getting started assessment evaluation veracity people xapi 2.0 IEEE 92741.1 conformance links resources developer resources tutorials veracity learning LRS support community announcements assessment and evaluation measurement KPIs xapi lrs tools Veracity Learning Veracity awards press statements tools speaking engagements conferences case studies dashboards augmented reality e-commerce xapi cohort visualizations LRP content development content authoring tools dashboards learning analytics custom dashboards Help help desk support VQL Dashboards Moodle LTI LMS software query xapi query language xapi profiles xapi reporting xapi analytics experience api learning record store xapi actor xapi dashboard lrs dashboard lrs tutorial xapi tutorials mongodb aggregation pipeline advanced queries LRS query techniques xAPI queries xapi query tincan launch xapi launch documentation easy install Veracity Lite downloads mongoDB NodeJS windows mac linux free Features Analytics Profiles Video Veracity server deployment scalability servers infrastructure IEEE ICICLE website NodeJS