diff --git a/example/methods_directory/physical/psp.json b/example/methods_directory/physical/psp.json
index 8ca42ef8f..75ce65a85 100644
--- a/example/methods_directory/physical/psp.json
+++ b/example/methods_directory/physical/psp.json
@@ -1,55 +1,98 @@
 {
     "name": "PAW Pseudopotential method",
     "path": "/qm/wf/psp/paw",
-    "slug": "pseudopotential",
     "categories": {
         "tier1": "qm",
         "tier2": "wf",
         "type": "psp",
         "subtype": "paw"
     },
-    "data": [
+    "metaProperties": [
         {
-            "element": "Ru",
-            "hash": "3349af97451e04faae570056fb6a110b",
-            "filename": "ru_pbe_dojo-oncv_0.4.upf",
-            "path": "/export/share/pseudo/ru/gga/pbe/dojo-oncv/0.4/nc/ru_pbe_dojo-oncv_0.4.upf",
-            "valenceConfiguration": [
-                {
-                    "orbitalName": "4S",
-                    "orbitalIndex": 1,
-                    "principalNumber": 4,
-                    "angularMomentum": 0,
-                    "occupation": 2.0
-                },
-                {
-                    "orbitalName": "4P",
-                    "orbitalIndex": 2,
-                    "principalNumber": 4,
-                    "angularMomentum": 1,
-                    "occupation": 6.0
-                },
-                {
-                    "orbitalName": "4D",
-                    "orbitalIndex": 3,
-                    "principalNumber": 4,
-                    "angularMomentum": 2,
-                    "occupation": 7.0
+            "slug": "pseudopotential",
+            "data": {
+                "element": "Ru",
+                "hash": "3349af97451e04faae570056fb6a110b",
+                "filename": "ru_pbe_dojo-oncv_0.4.upf",
+                "path": "/export/share/pseudo/ru/gga/pbe/dojo-oncv/0.4/nc/ru_pbe_dojo-oncv_0.4.upf",
+                "valenceConfiguration": [
+                    {
+                        "orbitalName": "4S",
+                        "orbitalIndex": 1,
+                        "principalNumber": 4,
+                        "angularMomentum": 0,
+                        "occupation": 2.0
+                    },
+                    {
+                        "orbitalName": "4P",
+                        "orbitalIndex": 2,
+                        "principalNumber": 4,
+                        "angularMomentum": 1,
+                        "occupation": 6.0
+                    },
+                    {
+                        "orbitalName": "4D",
+                        "orbitalIndex": 3,
+                        "principalNumber": 4,
+                        "angularMomentum": 2,
+                        "occupation": 7.0
+                    },
+                    {
+                        "orbitalName": "5S",
+                        "orbitalIndex": 4,
+                        "principalNumber": 5,
+                        "angularMomentum": 0,
+                        "occupation": 1.0
+                    }
+                ],
+                "apps": ["espresso"],
+                "exchangeCorrelation": { "functional": "pbe", "approximation": "gga" },
+                "name": "pseudopotential",
+                "source": "dojo-oncv",
+                "type": "nc",
+                "version": "0.4"
+            }
+        },
+        {
+            "slug": "pseudopotential",
+            "data": {
+                "element": "Rb",
+                "hash": "43c180bf64dcab4d78c412dc7c20744c",
+                "filename": "rb_pbe_dojo-oncv_0.4.upf",
+                "path": "/export/share/pseudo/rb/gga/pbe/dojo-oncv/0.4/nc/rb_pbe_dojo-oncv_0.4.upf",
+                "valenceConfiguration": [
+                    {
+                        "orbitalName": "4S",
+                        "orbitalIndex": 1,
+                        "principalNumber": 4,
+                        "angularMomentum": 0,
+                        "occupation": 2.0
+                    },
+                    {
+                        "orbitalName": "4P",
+                        "orbitalIndex": 2,
+                        "principalNumber": 4,
+                        "angularMomentum": 1,
+                        "occupation": 6.0
+                    },
+                    {
+                        "orbitalName": "5S",
+                        "orbitalIndex": 3,
+                        "principalNumber": 5,
+                        "angularMomentum": 0,
+                        "occupation": 1.0
+                    }
+                ],
+                "apps": ["espresso"],
+                "exchangeCorrelation": {
+                    "functional": "pbe",
+                    "approximation": "gga"
                 },
-                {
-                    "orbitalName": "5S",
-                    "orbitalIndex": 4,
-                    "principalNumber": 5,
-                    "angularMomentum": 0,
-                    "occupation": 1.0
-                }
-            ],
-            "apps": ["espresso"],
-            "exchangeCorrelation": { "functional": "pbe", "approximation": "gga" },
-            "name": "pseudopotential",
-            "source": "dojo-oncv",
-            "type": "nc",
-            "version": "0.4"
+                "name": "pseudopotential",
+                "source": "dojo-oncv",
+                "type": "nc",
+                "version": "0.4"
+            }
         }
     ]
 }
diff --git a/schema/methods_directory/physical/psp.json b/schema/methods_directory/physical/psp.json
index e4b28b1d2..2faa1d887 100644
--- a/schema/methods_directory/physical/psp.json
+++ b/schema/methods_directory/physical/psp.json
@@ -12,11 +12,7 @@
         "categories": {
             "$ref": "../../methods_category/physical/qm/wf/psp.json"
         },
-        "slug": {
-            "type": "string",
-            "description": "pseudopotential"
-        },
-        "data": {
+        "metaProperties": {
             "type": "array",
             "items": {
                 "description": "Specific data based on pseudopotential file.",
diff --git a/schema/methods_directory/physical/psp/file.json b/schema/methods_directory/physical/psp/file.json
index 736bf8e47..e4b0ddc4d 100644
--- a/schema/methods_directory/physical/psp/file.json
+++ b/schema/methods_directory/physical/psp/file.json
@@ -2,76 +2,85 @@
     "$id": "methods-directory/physical/psp/file",
     "$schema": "http://json-schema.org/draft-04/schema#",
     "title": "pseudopotential file",
+    "description": "Data parsed from specific pseudopotential file (UPF or POTCAR)",
     "properties": {
-        "element": {
-            "type": "string",
-            "description": "chemical element"
-        },
-        "hash": {
-            "type": "string",
-            "description": "MD5 hash of the pseudopotential file"
-        },
-        "type": {
-            "type": "string",
-            "description": "type of pseudization",
-            "$ref": "../../../methods_category/physical/qm/wf/enum_options.json#/pseudoSubtypes"
-        },
-        "source": {
-            "type": "string",
-            "description": "explains where this came from"
-        },
-        "version": {
-            "type": "string",
-            "description": "explains the version of where this came from"
+        "slug": {
+            "enum": ["pseudopotential"]
         },
-        "exchangeCorrelation": {
+        "data": {
             "type": "object",
             "properties": {
-                "approximation": {
-                    "description": "DFT approximation",
-                    "type": "string"
+                "element": {
+                    "type": "string",
+                    "description": "chemical element"
+                },
+                "hash": {
+                    "type": "string",
+                    "description": "MD5 hash of the pseudopotential file"
+                },
+                "type": {
+                    "type": "string",
+                    "description": "type of pseudization",
+                    "$ref": "../../../methods_category/physical/qm/wf/enum_options.json#/pseudoSubtypes"
+                },
+                "source": {
+                    "type": "string",
+                    "description": "explains where this came from"
+                },
+                "version": {
+                    "type": "string",
+                    "description": "explains the version of where this came from"
+                },
+                "exchangeCorrelation": {
+                    "type": "object",
+                    "properties": {
+                        "approximation": {
+                            "description": "DFT approximation",
+                            "type": "string"
+                        },
+                        "functional": {
+                            "description": "Exchange correlation functional",
+                            "type": "string"
+                        },
+                        "path": {
+                            "description": "DFT model path, e.g. '/pb/qm/dft/ksdft/gga?functional=pbe'",
+                            "$ref": "../../../core/reusable/category_path.json"
+                        }
+                    }
                 },
-                "functional": {
-                    "description": "Exchange correlation functional",
-                    "type": "string"
+                "valenceConfiguration": {
+                    "type": "array",
+                    "description": "contains pseudo orbital information, including orbital names and occupations",
+                    "items": {
+                        "$ref": "../../../core/reusable/atomic_orbital.json"
+                    }
                 },
                 "path": {
-                    "description": "DFT model path, e.g. '/pb/qm/dft/ksdft/gga?functional=pbe'",
-                    "$ref": "../../../core/reusable/category_path.json"
+                    "type": "string",
+                    "description": "location of the pseudopotential file on filesystem"
+                },
+                "apps": {
+                    "type": "array",
+                    "description": "simulation engines that can use this pseudopotential"
+                },
+                "filename": {
+                    "type": "string",
+                    "description": "filename of pseudopotential file on filesystem"
+                },
+                "name": {
+                    "type": "string",
+                    "description": "name of the data category",
+                    "enum": ["pseudopotential"]
                 }
-            }
-        },
-        "valenceConfiguration": {
-            "type": "array",
-            "description": "contains pseudo orbital information, including orbital names and occupations",
-            "items": {
-                "$ref": "../../../core/reusable/atomic_orbital.json"
-            }
-        },
-        "path": {
-            "type": "string",
-            "description": "location of the pseudopotential file on filesystem"
-        },
-        "apps": {
-            "type": "array",
-            "description": "simulation engines that can use this pseudopotential"
-        },
-        "filename": {
-            "type": "string",
-            "description": "filename of pseudopotential file on filesystem"
-        },
-        "name": {
-            "type": "string",
-            "description": "name of the data category",
-            "enum": ["pseudopotential"]
+            },
+            "required": [
+                "element",
+                "type",
+                "exchangeCorrelation",
+                "source",
+                "path",
+                "apps"
+            ]
         }
-    },
-    "required": [
-        "element",
-        "type",
-        "exchangeCorrelation",
-        "source",
-        "path",
-        "apps"
-    ]
+    }
 }