From 9c6ce79fa414bdd987f2cd4262999df0abb21144 Mon Sep 17 00:00:00 2001
From: Cyrus Harrison <cyrush@llnl.gov>
Date: Wed, 14 Oct 2020 11:44:01 -0700
Subject: [PATCH] use i,j,k for optional struct ele origin, instead of i0,j0,k0

---
 CHANGELOG.md                                           | 1 +
 src/docs/sphinx/blueprint_mesh.rst                     | 6 +++---
 src/libs/blueprint/conduit_blueprint_mesh_examples.cpp | 4 ++--
 src/tests/relay/adios_test_utils.hpp                   | 6 +++---
 4 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3e4844fc7..37daf577f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -74,6 +74,7 @@ and this project aspires to adhere to [Semantic Versioning](https://semver.org/s
 #### Blueprint
 - Refactored the Polygonal and Polyhedral mesh blueprint specification to leverage one-to-many concepts and to allow more zero-copy use cases.
 - The `conduit_blueprint_mpi` library now depends on `conduit_relay_mpi`.
+- Optional Mesh Blueprint structured topology logical element offsets are now `{i,j,k}` instead of `{i0,j0,k0}`.
 
 
 ## [0.5.1] - Released 2020-01-18
diff --git a/src/docs/sphinx/blueprint_mesh.rst b/src/docs/sphinx/blueprint_mesh.rst
index 9659b728f..ac12f5eb6 100644
--- a/src/docs/sphinx/blueprint_mesh.rst
+++ b/src/docs/sphinx/blueprint_mesh.rst
@@ -196,20 +196,20 @@ The mesh blueprint protocol accepts four implicit ways to define a topology on a
    
    * topologies/topo/coordset: "coords"
    * topologies/topo/type: “uniform”
-   * topologies/topo/elements/origin/{i0,j0,k0} (optional, default = {0,0,0})
+   * topologies/topo/elements/origin/{i,j,k} (optional, default = {0,0,0})
    
 * **rectilinear**: An implicit topology that defines a grid of elements on top of a *rectilinear* coordinate set. 
    
    * topologies/topo/coordset: "coords"
    * topologies/topo/type: “rectilinear”
-   * topologies/topo/elements/origin/{i0,j0,k0} (optional, default = {0,0,0})
+   * topologies/topo/elements/origin/{i,j,k} (optional, default = {0,0,0})
   
 
 .. .. attention::
 ..    (can we collapse uniform + rectilinear?)
 .. * topologies/topo/type: “structured”
 .. * topologies/topo/elements/dims: "implicit"
-.. * topologies/topo/elements/origin/{i0,j0,k0} (optional, default = {0,0,0})
+.. * topologies/topo/elements/origin/{i,j,k} (optional, default = {0,0,0})
 .. * topologies/coordset: "coords"
 
 
diff --git a/src/libs/blueprint/conduit_blueprint_mesh_examples.cpp b/src/libs/blueprint/conduit_blueprint_mesh_examples.cpp
index ef117b45a..253c2a042 100644
--- a/src/libs/blueprint/conduit_blueprint_mesh_examples.cpp
+++ b/src/libs/blueprint/conduit_blueprint_mesh_examples.cpp
@@ -2860,8 +2860,8 @@ adjset_uniform(Node &res)
         domain_coords["origin/y"].set_float64(0.5*(i%2));
 
         Node &domain_topo = domain_node["topologies/topo"];
-        domain_topo["elements/origin/i0"].set_int32(20*(i/2));
-        domain_topo["elements/origin/j0"].set_int32(20*(i%2));
+        domain_topo["elements/origin/i"].set_int32(20*(i/2));
+        domain_topo["elements/origin/j"].set_int32(20*(i%2));
         domain_topo["type"].set_string("uniform");
         domain_topo["coordset"].set_string("coords");
 
diff --git a/src/tests/relay/adios_test_utils.hpp b/src/tests/relay/adios_test_utils.hpp
index 6131d9694..66cf4356e 100644
--- a/src/tests/relay/adios_test_utils.hpp
+++ b/src/tests/relay/adios_test_utils.hpp
@@ -218,9 +218,9 @@ void add_rectilinear_mesh(Node &n, conduit::float64 origin[3], conduit::float64
     n["coordsets/coords/values/z"] = coords[2];
     n["topologies/mesh/coordset"] = "coords";
     n["topologies/mesh/type"] = "rectilinear";
-    n["topologies/mesh/elements/origin/i0"] = origin[0];
-    n["topologies/mesh/elements/origin/j0"] = origin[1];
-    n["topologies/mesh/elements/origin/k0"] = origin[2];
+    n["topologies/mesh/elements/origin/i"] = origin[0];
+    n["topologies/mesh/elements/origin/j"] = origin[1];
+    n["topologies/mesh/elements/origin/k"] = origin[2];
 
     n["fields/radius/association"] = "vertex";
     n["fields/radius/type"] = "scalar";