How create link with Json expression {{ (var_rpa_docu | filter : {name: 'cedula' })[0].url}}

Hello,
i have screen created with Ui designer in Bonita 7.3.2, need screen to view archived cases, but have problems with display link of the Json array

How generate un link in Ur designer with {{ (var_rpa_docu| filter : {name: 'cedula' })[0].name}} ?
Thanks

Download: {{ (var_rpa_docu| filter : {name: 'cedula' })[0].name}} result "Download : cedula"

need the link of document.

'/bonita/portal/' + {{ (var_rpa_docu | filter : {name: 'cedula' })[0].url}} but result not contains the valid link of document.

the call:
../API/bpm/archivedCaseDocument?c=10&p=0&f=caseId=6032

the json:

[ { "submittedBy": "103", "archivedDate": "2016-09-07 11:07:37.257", "fileName": "index.jpeg", "author": "103", "contentStorageId": "721", "description": "", "index": "-1", "sourceObjectId": "721", "creationDate": "2016-09-07 11:07:02.890", "version": "1", "contentMimetype": "image/jpeg", "url": "documentDownload?fileName=index.jpeg&contentStorageId=721", "isInternal": "true", "caseId": "6032", "name": "poliza", "id": "612" }, { "submittedBy": "103", "archivedDate": "2016-09-07 11:07:37.257", "fileName": "index.jpeg", "author": "103", "contentStorageId": "722", "description": "", "index": "-1", "sourceObjectId": "722", "creationDate": "2016-09-07 11:07:02.890", "version": "1", "contentMimetype": "image/jpeg", "url": "documentDownload?fileName=index.jpeg&contentStorageId=722", "isInternal": "true", "caseId": "6032", "name": "factura", "id": "613" }, { "submittedBy": "103", "archivedDate": "2016-09-07 11:07:37.257", "fileName": "index.jpeg", "author": "103", "contentStorageId": "723", "description": "", "index": "-1", "sourceObjectId": "723", "creationDate": "2016-09-07 11:07:02.890", "version": "1", "contentMimetype": "image/jpeg", "url": "documentDownload?fileName=index.jpeg&contentStorageId=723", "isInternal": "true", "caseId": "6032", "name": "cedula", "id": "614" }, { "submittedBy": "104", "archivedDate": "2016-09-07 11:07:37.257", "fileName": "index.jpeg", "author": "104", "contentStorageId": "724", "description": "", "index": "-1", "sourceObjectId": "724", "creationDate": "2016-09-07 11:07:37.022", "version": "1", "contentMimetype": "image/jpeg", "url": "documentDownload?fileName=index.jpeg&contentStorageId=724", "isInternal": "true", "caseId": "6032", "name": "certificado_aeronavegabilidad", "id": "615" } ]