# Contributor Glossary Someone who adds more layers to QGreenland by configuring pipeline(s) to transform source data in to a standard QGreenland specification. ## Pipeline A chain of steps to build a QGIS Layer. ## Step A unit of work for transforming a layer. Must be a Linux shell command (e.g. `gdalwarp` or `ogr2ogr`). ## Boundary Instead of extent, which to some may imply rectangular or lon/lat-based shape, use the term "Boundary". You can define as many boundaries as you want with arbitrary names, in addition to the required `data` boundary, which is used for defining the initial extent shown when opening QGIS.