A reproduction of the XML Type Provider issue raised on Stack Overflow (see url at end). Essentially, DomainTypes appear in IntelliSense, but the compiler gives an **Error FS0039: The type 'Ul' is not defined (FS0039)** error, and the same thing for 'Li'. http://stackoverflow.com/questions/18453911/type-provider-not-recognized-when-building-project

XmlTypeProviderIssue.fs

module XmlTypeProviderIssue

open System
open FSharp.Data

type Html = XmlProvider<"""
<div>
    <span>
        <ul>
            <li/>          
        </ul>
    </span>  
</div>""">

let html = Html.GetSample()

// Div is defined
let divWorks (div:Html.DomainTypes.Div) = ()

// Span is defined
let spanWorks (span:Html.DomainTypes.Span) = ()

// Ul is not
let ulBreaks (ul:Html.DomainTypes.Ul) = ()

// and neither is Li
let liBreaks (li:Html.DomainTypes.Li) = ()