Sepro - Method for modeling and simulation. Inspired by biochemistry.
- Swift 4.2
Uses the following packages (no need to download, included in the Package manifest):
sepro MODEL STEPS runs the model for given number of steps and
generates output into
swift run Models/linker.sepro 10
Model is composed of model objects: actuators, structures and worlds. Each element of the model is identified by a symbol.
DEF TAG open DEF TAG closed DEF TAG hungry DEF SLOT next DEF SLOT site DEF SLOT complement
There are two kinds of actuators: unary
ACT and binary
REACT. The unary
actuator operates on a selection of objects matching the
pattern. The symbols of type tag are tested against object's tags and symbols
of type slot are tested against object's bindings.
! operator negates the
presence - denotes absence of given symbol.
The selector is followed by list of transitions which have form
IN subject transitions. In unary actuators the subject is
THIS, in binary actuator the subject
RIGHT representing left side of the selector or right side
of the selector respectively. The subject can be made indirect by adding
indirection slot such as
Transitions can be:
SET tagto set a tag.
UNSET tagto unset a tag.
BIND slot TO targetto create a new binding.
UNBIND slotto remove a binding.
In unary transition if the target for a binding is the same as the selected
object then it is referred to as
THIS. In binary binding we can't refer to
the object of the same "hand" (by design), only to the object from the other
hand which we call
ACT move WHERE (crawler node.next) IN THIS BIND node TO node.next ACT detach WHERE (crawler !node.next) IN THIS UNBIND node SET free ACT bind_complement WHERE (polymerase init t_site.nucleotide c_site.nucleotide) IN THIS UNSET init SET shift IN THIS.t_site BIND complement TO c_site
REACT close_box WHERE (box open) ON (lid free) IN LEFT SET closed UNSET open BIND top TO OTHER IN RIGHT UNSET free REACT r_origin WHERE (polymerase !t_site !c_site) ON (nucleotide origin) IN LEFT BIND t_site TO OTHER
The initial state is described through structures and worlds. Structure is a
simple graph definition with list of objects and bindings (edges). The object
definition has form:
OBJ name (tags). The scope object's name is only
the structure the object is contained in. The binding has form
BIND object.slot TO target_object. Only objects defined within the same structure can be used
for the bindings.
STRUCT triangle OBJ a (node) OBJ b (node) OBJ c (node) BIND a.next TO b BIND b.next TO c BIND c.next TO a STRUCT strand OBJ n1 (nucleotide G origin) OBJ n2 (nucleotide A) OBJ n3 (nucleotide T) OBJ n4 (nucleotide T) OBJ n5 (nucleotide A) OBJ n6 (nucleotide C) OBJ n7 (nucleotide A) BIND n1.next TO n2 BIND n2.next TO n3 BIND n3.next TO n4 BIND n4.next TO n5 BIND n5.next TO n6 BIND n6.next TO n7
The initial state of a simulation is defined by world which can be though as
"ingredients" of the simulated universe. The world items are specified as
count (tags) for copies of free-standing objects and
for copies of a given structure.
WORLD main 3 (free nucleotide A) 3 (free nucleotide C) 3 (free nucleotide T) 3 (free nucleotide G) 1 strand 1 (polymerase)
Model can have (meta) data associated with it. The data is not relevant to the
simulation itself, but might be used by the simulator or a visualisation
component. The data has form:
DATA (tags) "text". The tags are being used by
the tools as a key either by chosing all items that contain particuliar tag or
all items that match all the tags. One has to refer to the tool documentation
to learn how the key is used.
DATA (dot_style nucleotide) "rounded" DATA (dot_color A) "salmon" DATA (dot_color C) "slateblue" DATA (dot_color T) "sandybrown" DATA (dot_color G) "skyblue" DATA (dot_style polymerase) "filled" DATA (dot_fillcolor polymerase) "gold"
Stefan Urbanek email@example.com
Thanks to Ľubomir Sepro Lanátor.