Terminology

draft-marcas-nmop-knowledge-graph-yang.md

@@ -150,6 +150,8 @@ The extraction of this hidden knowledge from YANG models would enable the integr
 
 ## Terminology
 
+This document defines the following terms:
+
 Data materialization: Technique that collects data from remote data source and persists a copy the data in a target data storage. This process can also be seen as Extract-Transform-Load (ETL).
 
 Data virtualization: Technique wherein an intermediate component (i.e., data virtualization layer) exposes data available in a remote data sources without creating an copy of the data. The data virtualization layer keeps pointers to the original location of data, so when a data consumer asks for these data, the virtualization layer collects the data from the source and directly serves the data to the consumer.