In Arbil CMDI you can also create hierarchical collections of instances. The easiest way to do so is to create the parent and the child nodes separately in the Local Corpus, as if they were two different examples of instances. Once both are there in the Local Corpus tree, simply drag the child node into the parent node. A message will appear asking you whether you want to move the node X to the node Y. After selecting Move you will see the Local Corpus tree structure changed (see figures below).

Figure 3.8. Creating parent and child node

Figure 3.9. Creating a hierarchy

	Note
	The recommended Clarin profile to use in order to describe collections of instances is  clarin.eu:cr1:p_1284723009187.