Thank for you bjrmatos for feedback

I Sorry, I'm Brazilian, and, my English is still not very good, so I often do not express myself correctly in the language. I was able to solve the problem, I will post below so others can use this example:

I have three files: clientes(parent template), childClientes(child template) and dataClientes(data in json)
The parent template will show name and document, and child template will show items descriptions.
Below is the content of the files:

dataClientes(data in json)

{
"students" : [
{
"id": 1,
"name":"Robert",
"document": "324234234",
"items":[{"description":"pen"}, {"description":"pencil"}]

    }, 
    {
        "id":2,
        "name":"Peter", 
        "document": "3423423", 
        "items":[{"description":"erase"}, {"description":"pen"}]
        
    }  
]

}

clientes(parent template)

<meta charset="UTF-8">
<br><br>
<table width="100%">
<p><th align="left" width="50%">Name</th></p>
<p></p><th align="left" width="50%">Document</th></p>
</table>
{{#each students}}

<table width="100%">
<tr>
<td width="50%">
{{name}}
</td>
<td width=50%>
{{document}}
</td>
</tr>
<tr> </tr>
<tr>
{{#each items}}
{#child childClientes @data.value= {{description}} }
{{/each}}

</tr>
{{/each}}

</table>

childClientes(child template)

<table>
<tr>
<td>    {{value}}</td>
</tr>
</table>

Please, I have two table :

client:

atributes:
id
name

items:
id
description

and I need to do a report that show this way:

name: John
description: pencil
description: pen
name: Peter
description: erase
description: pen

I need to use child templates for this, but I don't know how to implement. Do you have someone example?

Best regards

Great! Thank you very much!!!

I'm trying to run this code in JSReport but not working. I'm get Total without value. I'm starting in jsreport, please, help me with this problem.

{{*window.total = 0}}

{{for students}}
{{total += 1}}
{{/for}}
total {{: total}}

Data
{
"students": [
{
"nome": "Rodrigo",
"cpf": "3432423423"
},
{
"nome": "Jose",
"cpf": "4134231412"
}
]
}

Regards,

Rodrigo

Please, JSReport print label too? Because I need a report tool that has this resource.
Regards,

Rodrigo Americo