The true power of standards becomes apparent when we have the ability to build directly upon them. Through the use of Composable Subgraphs, you can seamlessly construct your projects using already available data rather than going through the redundant process of re-indexing. This functionality permits a Subgraph to access the indexed entities of another Subgraph to use as its underlying source. To take advantage of this feature, simply ensure your setup includes kind: subgraph and uses specVersion 1.3.0 and up.