In the previous example, we hardcoded the tag list in the code, but in a real-world case we need to use the asset registry. Predix provides an asset registry database called Predix Asset, which can be found at https://docs.predix.io/en-US/content/service/data_management/asset/. We can also configure our application to ask for tags stored on the TSDB, but when the tag list becomes very large we need to use the asset hierarchy.