Merge pull request #865 from SciML/proposed_compositional_modelling_doc_updates

Proposed compositional modelling doc updates

Author: isaacsas

docs/pages.jl

@@ -9,7 +9,7 @@ pages = Any[
         "model_creation/dsl_basics.md",
         "model_creation/dsl_advanced.md",
         #"model_creation/programmatic_CRN_construction.md",
-        #"model_creation/compositional_modeling.md",
+        "model_creation/compositional_modeling.md",
         #"model_creation/constraint_equations.md",
         # Events.
         #"model_creation/parametric_stoichiometry.md",# Distributed parameters, rates, and initial conditions.

docs/src/model_creation/compositional_modeling.md

@@ -18,10 +18,10 @@ end
 Alternatively one can just build the `ReactionSystem` via the symbolic interface.
 ```@example ex0
 @parameters d
-@variable t
+t = default_t()
 @species X(t)
 rx = Reaction(d, [X], nothing)
-@named degradation_component = ReactionSystem([rs], t)
+@named degradation_component = ReactionSystem([rx], t)
 ```
 We can test whether a system is complete using the `ModelingToolkit.iscomplete` function:
 ```@example ex0