Your kidding me right... zip is a reserved form field name
If only it where true, but it alas it's not. If you have the pleasure of using Plone as your CMS and you want to lets say make a form that captures a zip code, you can't name that form field 'zip' as its a reserved word in plone. Some other common words are also reserved. Lets say you need to have a form submit to oh I don't know paypal, you've got major issues. Hidden fields for a paypal form require login, discription and type. Guess what, yup all reserved words. So how does one get around this. A little python and javascript that's how. Nicely the Plone Form Gen devs added overrides so you can modify the form on submit and on load like so:
return \
"""
jq(document).ready(function(){
jq("#archetypes-fieldname-login-1 input").attr("name","login");
jq("#archetypes-fieldname-type-1 input").attr("name","type");
jq("#archetypes-fieldname-description-1 input").attr("name","description")
});
"""
nothing to special but it's a stupid hack that shouldn't be needed IMO.