reveal.js

icon	Topic	name	pluralName	documentation
	Step	Step	Steps	A Step is a Graph Traversal Step in the Gremlin language - you can think of it as in instruction an a graph computer

Steps[edit]

Step	name	kind	reference	javadoc	text	level
Gremlin	addE	sideEffect	addedge-step	addE-java.lang.String-	is used to add edges to the graph	2
Gremlin	addV	sideEffect	addvertex-step	addV-java.lang.String-	is used to add vertices to the graph	2
Gremlin	aggregate	sideEffect	aggregate-step	aggregate-java.lang.String-	is used to aggregate all the objects at a particular point of traversal into a Collection	2
Gremlin	and	filter	and-step	and-org.apache.tinkerpop.gremlin.process.traversal.Traversal...-	ensures that all provided traversals yield a result	2
Gremlin	as	modulator	as-step	as-java.lang.String-java.lang.String...-	is not a real step, but a "step modulator" similar to by() and option(). With as(), it is possible to provide a label to the step that can later be accessed by steps and data structures that make use of such labels — e.g., select(), match(), and path	2
Gremlin	both	flatMap			maps the current elements to the vertices at the boths ends of the edges.	2
Gremlin	bothE	flatMap			maps the current elements to both the in and outgoing edges.	2
Gremlin	bothV	flatMap			maps the current edges to both the ingoing and outgoing Vertices.	2
Gremlin	branch	general	general-steps		Splits the traverser	2
Gremlin	by	modulator	by-step	by--	is not an actual step, but instead is a "step-modulator" similar to as() and option(). If a step is able to accept traversals, functions, comparators, etc. then by() is the means by which they are added. The general pattern is step().by()…by(). Some steps can only accept one by() while others can take an arbitrary amount.	2
Gremlin	cap	barrier	cap-step	cap-java.lang.String-java.lang.String...-	Iterates the traversal up to the itself and emits the side-effect referenced by the key. If multiple keys are supplied then the side-effects are emitted as a Map.	3
Gremlin	choose	branch	choose-step	choose-java.util.function.Function-,choose-java.util.function.Predicate-org.apache.tinkerpop.gremlin.process.traversal.Traversal-	routes the current traverser to a particular traversal branch option. With choose(), it is possible to implement if/then/else-semantics as well as more complicated selections.	2
Gremlin	coalesce	flatMap	coalesce-step		The coalesce()-step evaluates the provided traversals in order and returns the first traversal that emits at least one element.	2
Gremlin	coin	filter	coin-step	coin-double-	randomly filters out traversers with the given probability	2
Gremlin	count	reducing barrier	count-step	count--	counts the total number of represented traversers in the streams (i.e. the bulk count).	3
Gremlin	emit	modulator	emit-step	emit--	is not an actual step, but is instead a step modulator for repeat() (find more documentation on the emit() there).	2
Gremlin	explain	terminal	terminal-steps		will return a TraversalExplanation. A traversal explanation details how the traversal (prior to explain()) will be compiled given the registered traversal strategies. A TraversalExplanation has a toString() representation with 3-columns. The first column is the traversal strategy being applied. The second column is the traversal strategy category: [D]ecoration, [O]ptimization, [P]rovider optimization, [F]inalization, and [V]erification. Finally, the third column is the state of the traversal post strategy application. The final traversal is the resultant execution plan.	2
Gremlin	fill	terminal	terminal-steps		fill(collection) will put all results in the provided collection and return the collection when complete.	2
Gremlin	filter	general	general-steps		Continues processing based on the given filter condition.	2
Gremlin	flatMap	general	general-steps		transforms the current step in a one to many fashion.	2
Gremlin	fold	reducing barrier	fold-step		There are situations when the traversal stream needs a "barrier" to aggregate all the objects and emit a computation that is a function of the aggregate. The fold()-step (map) is one particular instance of this. Please see unfold()-step for the inverse functionality.	3
Gremlin	has	filter	has-step	has-java.lang.String-	filters vertices, edges, and vertex properties based on their properties. This step has quite a few variations.	2
Gremlin	hasNext	terminal	terminal-steps		determines whether there are available results	2
Gremlin	id	map	id-step		maps the traversal to the ids of the current elements.	2
Gremlin	in	flatMap			maps the current elements to the vertices at the end of the ingoing edges.	2
Gremlin	inE	flatMap			maps the current elements to the the ingoing edges.	2
Gremlin	inV	flatMap			maps the current edges to the the ingoing Vertices.	2
Gremlin	is	filter	is-step	is-org.apache.tinkerpop.gremlin.process.traversal.P-	filters elements that fullfill the given predicate. Variant: Filters elements that are equal to the given Object.	2
Gremlin	iterate	terminal	terminal-steps		Iterates the traversal presumably for the generation of side-effects. See https://stackoverflow.com/questions/47403296/iterate-step-is-used-in-the-end-of-the-command-when-creating-nodes-and-edges-t	2
Gremlin	label	map	label-step		maps the traversal to the labels of the current elements.	2
Gremlin	limit	filter	limit-step
Gremlin	map	general	general-steps		transforms the current step element to a new element (which may be empty). see also https://stackoverflow.com/questions/51015636/in-gremlin-how-does-map-really-work	2
Gremlin	match	map	match-step		see https://stackoverflow.com/questions/55609832/is-threre-a-document-about-how-gremlin-match-works	2
Gremlin	max	reducing barrier	max-step		operates on a stream of comparable objects and determines which is the last object according to its natural order in the stream.	3
Gremlin	mean	reducing barrier	mean-step		operates on a stream of numbers and determines the average of those numbers.	3
Gremlin	min	reducing barrier	min-step		operates on a stream of comparable objects and determines which is the first object according to its natural order in the stream.	3
Gremlin	next	terminal	terminal-steps		will return the next result.next(n) will return the next n results in a list	2
Gremlin	option	modulator	option-step		An option to a branch() or choose()	2
Gremlin	or	filter	or-step	or-org.apache.tinkerpop.gremlin.process.traversal.Traversal...-	ensures that at least one of the provided traversals yield a result.	2
Gremlin	order	map	order-step	order--,order-org.apache.tinkerpop.gremlin.process.traversal.Scope-	orders the traversal elements	2
Gremlin	out	flatMap			maps the current elements to the vertices at the end of the outgoing edges.	2
Gremlin	outE	flatMap			maps the current elements to the the outgoing edges.	2
Gremlin	outV	flatMap			The outV step maps the current edges to the outgoing Vertices.	2
Gremlin	path	map	path-step			2
Gremlin	promise	terminal	terminal-steps		can only be used with remote traversals to Gremlin Server or RGPs. It starts a promise to execute a function on the current Traversal that will be completed in the future.	2
Gremlin	property	sideEffect	addproperty-step	property-java.lang.Object-java.lang.Object-java.lang.Object...-	is used to add properties to the elements of the graph	2
Gremlin	range	filter	range-step
Gremlin	repeat	branch	repeat-step	repeat-org.apache.tinkerpop.gremlin.process.traversal.Traversal-,repeat-java.lang.String-org.apache.tinkerpop.gremlin.process.traversal.Traversal-	is used for looping over a traversal given some break predicate	2
Gremlin	select	map	select-step			2
Gremlin	sideEffect	general	general-steps		performs some operation on the traverser and passes it to the next step.	2
... further results

List of Steps

Steps[edit]

SiDIF[edit]