XSLT (1.0 and 2.0), XPATH, XQuery, DTD, Schema, Schematron, DITA/DITAC and XML. MarkLogic consultant (Worked/Working in v 4.1, 4.2, 5, 6 and 8). Capable of designing and enhancing data model to store XML in the best way. Hands on Experience in: 1) Node.js 2) REST based APIs using Node.js and JAVA 3) Build GraphQL server using Apollo Server (A library for writing GraphQL servers with JavaScript.) and connected existing REST APIs designed using MarkLogic