REXS Specification

The *.rexsj file extension should be used for REXS-JSON files. Alternatively, the following file extensions are also allowed:

The REXS model is contained in a JSON object called "model," which includes a row of name-value pairs. In addition to the metadata ("version," "applicationId," "applicationVersion," "date," "applicationLanguage"), the "model" object contains the "relations" and "components" arrays, as well as a "load_spectrum" object if necessary.

Example REXS file metadata | XML Syntax

<model version="1.4" applicationId="FVA-Workbench" applicationVersion="7.0.0" date="2021-11-03T11:35:17+01:00" applicationLanguage="en">
	<relations>...</relations>
	<components>...</components>
	<load_spectrum>...</load_spectrum> (optional)
</model>

Example REXS file metadata | JSON Syntax

{"model": { "version": "1.4",  "applicationId":"FVA-Workbench", "applicationVersion":"7.0.0", "date":"2021-11-03T11:35:17+01:00", "applicationLanguage":"en",
				"relations": [...],
				"components": [...],
				"load_spectrum": {...} (optional)
	   } }

The "relations" array contains a list of JSON objects. Each of these objects includes the name-value pairs "id" (ID of the relation), "type" (type of relation), "order" (for relevant relation types), and the "refs" array. The "refs" array contains a list of objects with the name-value pairs "role" (role of the component in the relation), "id" (ID of the component in the relation), "hint" (optional addition for improved clarity).

Clarification: Multiple objects with the same role are not permitted in the "refs" array of a relation. For example, it is not allowed to use multiple "part" elements in the same assembly relation. A separate relation must be created for each "part."

Example REXS file relations | XML syntax

<relations>
	<relation id="15" type="ordered_assembly" order="1">
		<ref id="8" role="assembly" hint="bearing"/>
		<ref id="16" role="part" hint="bearing_row"/>
	</relation>
	<relation id="23" type="stage">
		<ref id="3" role="stage" hint="cylindrical_stage"/>
		<ref id="7" role="gear_1" hint="cylindrical_gear"/>
		<ref id="9" role="gear_2" hint="cylindrical_gear"/>
	</relation>
</relations>

Example REXS file relations | JSON syntax

"relations": [
	{"id":15, "type":"ordered_assembly", "order":1,
	"refs": [
		{"id":8, "role":"assembly", "hint":"bearing"},
		{"id":16, "role":"part", "hint":"bearing_row"}
		]
	},
	{"id":23, "type":"stage",
	"refs": [
		{"id":3, "role":"stage", "hint":"cylindrical_stage"},
		{"id":7, "role":"gear_1", "hint":"cylindrical_gear"},
		{"id":9, "role":"gear_2", "hint":"cylindrical_gear"}
		]
	},
]

The "components" array contains a list of JSON objects. Each of these objects includes the name-value pairs "id" (ID of the component), "name" (component name), "type" (component type), as well as the "attributes" array.

Overview of name-value pairs in components:

The "load_spectrum" object includes the name-value pairs "id" (ID of the load spectrum), "accumulation" (sub-model for accumulated values of the spectrum), as well as the "load_cases" array. The "accumulation" object contains a "components" array. The "load_cases" array contains a list of JSON objects, each of which includes both an "id" and a "components" array.

For details on the modeling system, see load spectra.

Example load spectrum | JSON syntax

"load_spectrum": {
		"id": 1,
		"load_cases": [
			{
				"id": 1,
				"components": [
					{ "id": 1, "attributes": [...]},
					{ ... },
					...
				]
			},
			{
				"id": 2,
				"components": [
					{ "id": 2, "attributes": [...]},
					{ ... },
					...
				]
			},
			...
		]
		"accumulation": {
			"components": [
				{ "id": 2, "attributes": [...]},
				{ ... },
				...
			]
		}
}

Example model | JSON syntax

{
 "model": {
	"applicationId": "Bearinx",
	"applicationVersion": "12.0.8823",
	"date": "2021-07-01T12:18:38+01:00",
	"version": "1.3",
	"relations": [
	 {
		"id": 48,
		"type": "assembly",
		"refs": [
			{"hint": "gear_unit","id": 1,"role": "assembly"},
			{"hint": "gear_casing","id": 2,"role": "part"}
		]
	 },
	 {
		"id": 49,
		"type": "side",
		"refs": [
			{"hint": "concept_bearing","id": 40,"role": "assembly"},
			{"hint": "shaft","id": 13,"role": "inner_part"},
			{"hint": "gear_casing","id": 2,"role": "outer_part"}
		]
	 }
	 ...
	 ]
	"components": [
	 {
		"id": 1,
		"name": "Transmission unit",
		"type": "gear_unit",
		"attributes": [
		     {"id": "example_string", "string": "30203-A"},
		     {"id": "example_floating_point_unit", "unit": "mm", "floating_point": 2.0},
		     {"id": "example_floating_point_without_unit", "unit": "none", "floating_point": 0.1},
		     {"id": "example_integer", "integer": 3},
		     {"id": "example_boolean", "boolean": false},
		     {"id": "example_enum", "enum": "both_directions" },
		     {"id": "example_floating_point_array", "unit": "mm","floating_point_array": [1.0,0.0,0.0]},
		     {"id": "example_floating_point_matrix", "unit": "mm", "floating_point_matrix":
                        [[1.0,0.0,0.0],
                         [0.0,1.0,0.0],
                         [0.0,0.0,1.0]] },
		     {"id": "example_array_coded", "unit": "mm", "floating_point_array_coded":
                        {"code": "float64", "value": "62wRNhgQS0AAAAAAAAAAANgPsyG1MXDA"}},
		     {"id": "example_array_of_arrays", "array_of_integer_arrays":
                        [[108,2,1,107,7],[0,1,0],[0,7,0,1]]},
                    ]
	 }
	 {
		"id": 2,
		"name": "Input shaft",
		"type": "shaft",
		"attributes": [
			...
		]
	 }
	 ...
	]
	"load_spectrum": {
		"id": 1,
		"load_cases": [
		 {
		 	"id": 2,
		 	"components": [
				{
					"id": 2,
					"attributes": [
						...
					]
				},
				{	...	},
				...
			 ]
		 },
		 {	...	}
		]
		"accumulation": {
			"components": [
				{
					"id": 2,
					"attributes": [	...	]
				},
				{ ... },
				...
			]
		}
	 }
 }
}