From de0211c1f2b4b97c3c99481eba85a6813a92bfce Mon Sep 17 00:00:00 2001
From: Datseris <datseris.george@gmail.com>
Date: Fri, 23 Feb 2024 11:55:46 +0000
Subject: [PATCH] fix typo in docs

---
 docs/src/index.md | 2 +-
 src/API.jl        | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/docs/src/index.md b/docs/src/index.md
index 8aadd0e..75ce767 100644
--- a/docs/src/index.md
+++ b/docs/src/index.md
@@ -187,7 +187,7 @@ ExpRelaxation
 
 ## `Process` API
 
-This API describes how you can implement your own `Process` subtype, if the [existing predefined subtypes](@ref predefineProcessBasedModelling.timescaled_processes) don't fit your bill!
+This API describes how you can implement your own `Process` subtype, if the [existing predefined subtypes](@ref predefined_processes) don't fit your bill!
 
 ```@docs
 Process
diff --git a/src/API.jl b/src/API.jl
index f56c2c1..2e93e01 100644
--- a/src/API.jl
+++ b/src/API.jl
@@ -1,5 +1,8 @@
 """
-A process subtype `p::Process` extends the following unexported functions:
+    Process
+
+A new process must subtype `Process` and can be used in [`processes_to_mtkmodel`](@ref).
+The type must extend the following functions from the module `ProcessBasedModelling`:
 
 - `lhs_variable(p)` which returns the variable the process describes
   (left-hand-side variable). There is a default implementation
@@ -57,7 +60,7 @@ function lhs(p::Process)
     τ = timescale(p)
     v = lhs_variable(p)
     if isnothing(τ) # time variability exists but timescale is nonexistent (unity)
-        return D(v)
+        return D(v) # `D` is the MTK canonical variable for time derivative
     elseif τ isa NoTimeDerivative || iszero(τ) # no time variability
         return v
     else # τ is either Num or Real