data ClusterPoint {
	Data element
	dec values[]
	}

data Cluster {
	ClusterPoint members[]
	dec mean[]
	}

/*
{"description" : "A clustering algorithm."}
*/
interface Clustering {
	
	/*
	{"@description" : "Initialise clustering algorithm for a coordinate space of the given dimensionality",
		"dimensions" : "The number of dimensions of the coordinate space that you will use for clustering (e.g. 2 for an x/y space)"}
	*/
	Clustering(int dimensions)
	
	/*
	{"@description" : "Add a value to the set from which clusters will be formed",
		"values" : "The numeric values of this coordinate, which must be of length 'dimensions'",
		"el" : "A data element to associate with this value"}
	*/
	void addValue(dec values[], store Data el)
	
	/*
	{"@description" : "Run the clustering algorithm on the accumulated values",
		"k" : "The number of clusters to create",
		"@return" : "The set of clusters"}
	*/
	Cluster[] cluster(int k)
	}