Given an XML document such as this:

<Processes>
    <Params>
        <ParamName> today </ParamName>
        <ParamType>1</ParamType>
        <ParamValue/>
    </Params>
   <Params>
        <ParamName> today </ParamName>
        <ParamType>2</ParamType>
        <ParamValue/>
    </Params>
   <Params>
        <ParamName> today </ParamName>
        <ParamType>3</ParamType>
        <ParamValue/>
    </Params>
<Processes>

Using the beevik/etree for Go, how can I access <ParamValue/> for each instance of <Params> in the document to populate it with a value when <ParamName> has a particular, specific value.

In the given example, I’d want to populate all <ParamValue/> nodes in all the <Params> nodes with 05/02/2024 when <ParamName> holds the value today.

This code only works on the first instance of the <Params> node in a document containing many instances where <ParamName>== today , although the loop should seemingly access every instance of <Params>:

    for _, elem1 := range doc.FindElements(".//Processes//Params//ParamName") {
    
            if elem1 == nil {
                log.Fatal("Check XPath)
            }
    
            s := elem1.Text()
    
            if s == "today" {
                elems2 := elem1.FindElement("//ParamValue")
                elems2.SetText("05/02/2024")
            }
    }

How can I do this? Why doesn’t range doc.FindElements(".//Processes//Params//ParamName") find every instance of <Params>?