# Matt Warren discusses ObjectSpaces and ORM in general
Check out this post from ['The Wayward WebLog'](https://blogs.msdn.com/mattwar/)... it is a good discussion starter for anyone who wants to chat about ORM (object-relational mapping) ...

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    <a id="viewpost.ascx_TitleUrl" href="http://weblogs.asp.net/mattwar/archive/2004/04/20/117096.aspx">ObjectSpaces: The Devil is in the Demand</a>



    _I’ve coined the phrase ‘object span’ to describe the ability to front load a graph-based query with enough information to cherry pick at the best bits of data so data retrieval is optimized to the application.<span deactivatedstyle="mso-spacerun: yes">  </span>I’ve even written about that _ [ <font color="#6666cc"> _here_  ](https://blogs.msdn.com/mattwar/archive/2004/03/15/90275.aspx) _.<span deactivatedstyle="mso-spacerun: yes">  </span>Yet I’ve never felt one hundred percent right about any of it.<span deactivatedstyle="mso-spacerun: yes">  </span>Not the span exactly, but the whole concept of systems designed to retrieve segments of a data graph into the client space, with interceptors (or swizzlers) that fault in more segments upon demand.<span deactivatedstyle="mso-spacerun: yes">  </span>I’ve come to the conclusion that demand loading is just a terribly bad idea._

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