diff --git a/lib/src/api/CombinatorsPes.gf b/lib/src/api/CombinatorsPes.gf
new file mode 100644
index 000000000..d2d0ad51b
--- /dev/null
+++ b/lib/src/api/CombinatorsPes.gf
@@ -0,0 +1,6 @@
+--# -path=.:alltenses:prelude
+
+resource CombinatorsPes = Combinators with 
+  (Cat = CatPes),
+  (Structural = StructuralPes),
+  (Constructors = ConstructorsPes) ;
diff --git a/lib/src/api/ConstructorsPes.gf b/lib/src/api/ConstructorsPes.gf
new file mode 100644
index 000000000..b3b1d8561
--- /dev/null
+++ b/lib/src/api/ConstructorsPes.gf
@@ -0,0 +1,3 @@
+--# -path=.:alltenses:prelude
+
+resource ConstructorsPes = Constructors with (Grammar = GrammarPes) ;
diff --git a/lib/src/api/SymbolicPes.gf b/lib/src/api/SymbolicPes.gf
new file mode 100644
index 000000000..6a007eadf
--- /dev/null
+++ b/lib/src/api/SymbolicPes.gf
@@ -0,0 +1,5 @@
+--# -path=.:present:mathematical:prelude
+
+resource SymbolicPes = Symbolic with 
+  (Symbol = SymbolPes),
+  (Grammar = GrammarPes) ;
diff --git a/lib/src/api/SyntaxPes.gf b/lib/src/api/SyntaxPes.gf
new file mode 100644
index 000000000..91b3cb6c2
--- /dev/null
+++ b/lib/src/api/SyntaxPes.gf
@@ -0,0 +1,5 @@
+--# -path=.:./alltenses:../prelude
+
+instance SyntaxPes of Syntax = 
+  ConstructorsPes, CatPes, StructuralPes, CombinatorsPes ;
+
diff --git a/lib/src/api/TryPes.gf b/lib/src/api/TryPes.gf
new file mode 100644
index 000000000..e1a53711d
--- /dev/null
+++ b/lib/src/api/TryPes.gf
@@ -0,0 +1,12 @@
+--# -path=.:alltenses:prelude:/users/shafqat/www.grammaticalframework.org_0/lib/src/persian
+
+resource TryPes = SyntaxPes, LexiconPes, ParadigmsPes -[mkDet,mkQuant]** 
+  open (P = ParadigmsPes) in {
+
+-- oper
+
+--  mkAdv = overload SyntaxPes {
+--    mkAdv : Str -> Adv = P.mkAdv ;
+--  } ;
+
+}