The easiest way to learn this query language is through examples. Many thanks to Dave Matthews and John Morris for their contributions to this document. Some common class names are Locus, Sequence, Author, Paper, Colleague, Germplasm, Map and Clone.
Tags are fields for information within a class.
For example, tags in the class Germplasm may be Source, Type, Features, and Parent. There can be any number of tags and subtags within a class. This will give you the information neccesary to construct queries for the data you want to see. It is important to list the model of every database you want to query because not all databases use the same model. Each organism has developed a database structure to suit their individual needs, although many class names and constructs are similar.