wsrp-extension value encoding clarification

I was reading the wsrp-extensions part of the spec: 9.2.1.9 and I am assuming parameter names and values should be encoded.

Here's the relevant section:

9.2.1.9 wsrp-extensions

Extensions to the data supplied on the URL which this protocol defines MUST use the following sequence to encode the additional information into the wsrp-extensions portlet URL parameter:

A querystring-like [20] value is built from the parameter identifiers and values to be set. Parameters that are an array of strings can be specified by repeating the parameter. For example, if a Portlet has two additional parameters, one is an array of strings (parameter name is "param1") and and the other a simple string (parameter name is "param2"), results in;
"param1=value1&param1=value2&param2=value3

The string built in step #1 is url-encoded so that it can appear as a querystring value or part of the path portion of the URL. The example becomes;
param1%3Dvalue1%26param1%3Dvalue2%26param2%3Dvalue3

The url-encoded string is then used as the value of the wsrp-extensions portlet url parameter or to replace it within a template.

So for example if param1=value1 were more complex:

Replace "param2" with "param=2"

Replace "value3" with "this & that"

I would expect the resulting string to be:

param1%3Dvalue1%26param1%3Dvalue2%26param%253D2%26%3Dthis%2520%2526%2520that

Is this correct?

Thanks,

Nate