# Any tools that can facilitate insertions of variable names in a template

**Category:** [Tools](https://discourse.openehr.org/c/tool-dev/36)
**Created:** 2024-10-09 07:50 UTC
**Views:** 78
**Replies:** 3
**URL:** https://discourse.openehr.org/t/any-tools-that-can-facilitate-insertions-of-variable-names-in-a-template/5782

---

## Post #1 by @linforest

[quote="ian.mcnicoll, post:1, topic:1199"]
Better CDR

```
{
  "_type": "EHR_STATUS",
 //  "archetype_node_id": "openEHR-EHR-EHR_STATUS.generic.v1",
 //  "name": "ehr status",
  "subject": {
    "external_ref": {
      "id": {
        "_type": "HIER_OBJECT_ID",
        "value": "{{subjectId}}"
      },
      "namespace":  "{{subjectNamespace}}",
      "type": "PERSON"
    }
  },
  "is_modifiable": "true",
  "is_queryable": "true"
}
```
[/quote]


Hi, @ian.mcnicoll. May I ask a question about the variable names in your snippet?
Such a variable name double-curly-braced is inserted automatically or manually?
When using a simplified template such as FLAT JSON to automatically populate/generate Composition instances, is there any tools that can facilitate insertions of variable names in the template?  For a "template", I mean a Composition instance to be populated.

Thanks.

---

## Post #2 by @linforest

For example, is there any tools that can automatically insert the vairiable name  "{{bodyTemperature}}" in the Web Template JSON just like the REST API to GET an example Composition based on a specified OPT template?

```
{
"vital_signs/body_temperature/any_event/temperature|magnitude": "{{bodyTemperature}}"
,
"vital_signs/body_temperature/any_event/temperature|unit": "℃"

...
}
```

---

## Post #3 by @ian.mcnicoll

Hi Lin,

That example is a part of our Postman collection - Postman is a lovely tool and it has a fairly sophisticated way of allowing you to inject variables, including from test data csv files etc.

For more sophisticated use, there are a number of different templating engines, one of the  more popular being Liquid templates - see  https://github.com/microsoft/FHIR-Converter?tab=readme-ov-file for some ideas.

---

## Post #4 by @linforest

Thanks a lot, @ian.mcnicoll.  It's exactly what I want.

---


**Canonical:** https://discourse.openehr.org/t/any-tools-that-can-facilitate-insertions-of-variable-names-in-a-template/5782
**Original content:** https://discourse.openehr.org/t/any-tools-that-can-facilitate-insertions-of-variable-names-in-a-template/5782