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Un Carril es una partición dentro de una Piscina, que se extiende a todo su largo, vertical u horizontalmente. A diferencia de las Piscinas, los Carriles se pueden anidar.
Se representan con un rectángulo de esquinas rectas inscrito dentro de la Piscina o Carril que lo contiene.
El nombre del Carril se puede colocar en cualquier dirección o ubicación, pero lo normal es colocarlo en la misma posición relativa del nombre la Piscina que lo contiene. El nombre del Carril no está separado de su contenido por una línea, excepto cuando tiene Subcarriles.
Los Carriles se utilizan para organizar y categorizar Actividades dentro de un Piscina. Normalmente, para representar roles o cargos internos (p. ej., Gerente, Grupo de Calidad), sistemas (p. ej., ERP, Sistema de Contabilidad), o una una unidad organizacional (p. ej., Despacho, Recursos Humanos). Todos los Carriles de un mismo nivel deben ser distintos casos de mismo criterio de agrupamiento.
Si los Carriles están anidados, lo normal es que los más externos representen unidades organizacionales, y los internos representen roles o cargos que trabajan en esas unidades.
Nota: BPMN no especifica el significado de los carriles, podrían ser usados por el modelador para representar cualquier criterio de agrupamiento de las Actividades dentro de la Piscina. Pero normalmente son usados para indicar los roles responsables de ejecutar las Actividades. Además, los Carriles son un mecanismo sofisticado de agrupamiento: puede haber viarios agrupamientos (cada uno con varios niveles). Un Elemento puede pertenecer a varios Carriles (varias "dimensiones"). No todos estos agrupamientos son "visuales".
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Especificación BPMN
A Lane is a sub-partition within a Process (often within a Pool) and will extend the entire length of the Process level, either vertically (see Figure 10.123) or horizontally (see Figure 10.124).
A Lane is a sub-partition within a Process (often within a Pool) and will extend the entire length of the Process level, either vertically (see Figure 10.122) or horizontally (see Figure 10.123). Text associated with the Lane (e.g., its name and/or that of any Process element attribute) can be placed inside the shape, in any direction or location, depending on the preference of the modeler or modeling tool vendor. Our examples place the name as a banner on the left side (for horizontal Pools) or at the top (for vertical Pools) on the other side of the line that separates the Pool name, however, this is not a requirement.
A Lane is a square-cornered rectangle that MUST be drawn with a solid single line (see Figure 10.123 and Figure 10.124).
The label for the Lane MAY be placed in any location and direction within the Lane, but MUST NOT be separated from the contents of the Lane by a single line (except in the case that there are sub-Lanes within the Lane).
Lanes are used to organize and categorize Activities within a Pool. The meaning of the Lanes is up to the modeler. BPMN does not specify the usage of Lanes. Lanes are often used for such things as internal roles (e.g., Manager, Associate), systems (e.g., an enterprise application), an internal department (e.g., shipping, finance), etc. In addition, Lanes can be nested (see Figure 10.125) or defined in a matrix. For example, there could be an outer set of Lanes for company departments and then an inner set of Lanes for roles within each department.
A Lane element defines one specific partition in a LaneSet. The Lane can define a partition element that specifies the value and element type, a tool can use to determine the list of Flow Nodes to be partitioned into this Lane. All Lanes in a single LaneSet MUST define partition element of the same type, e.g., all Lanes in a LaneSet reference a Resource as the partition element, but each Lane references a different Resource instance.
Advanced
When a Lane is defined it is contained within a LaneSet, which is contained within a Process.
The LaneSet element defines the container for one or more Lanes. A Process can contain one or more LaneSets. Each LaneSet and its Lanes can partition the Flow Nodes in a different way.
Lane Set Attributes
Attribute name. The name of the LaneSet. A LaneSet is not visually displayed on a BPMN diagram. Consequently, the name of the LaneSet is not displayed as well.
Attribute process. The Process owning the LaneSet
Attribute lanes. One or more Lane elements, which define a specific partition in the LaneSet.
Attribute parentLane. The reference to a Lane element which is the parent of this LaneSet.
Lane Attributes
Attribute name: string The name of the Lane
Attribute partitionElement. A reference to a BaseElement that specifies the partition value and partition type. Using this partition element a BPMN compliant tool can determine the FlowElements that have to be partitioned in this Lane.
Attribute partitionElementRef. A reference to a BaseElement that specifies the partition value and partition type. Using this partition element a BPMN compliant tool can determine the FlowElements that have to be partitioned in this Lane.
Attribute childLaneSet. A reference to a LaneSet element for embedded Lanes.
Attribute flowNodeRefs. The list of FlowNodes partitioned into this Lane according to the partitionElement defined as part of the Lane element.
