Writing Attribute
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## Writing Attribute

Writing an attribute is similar to writing text to a new element. In this case, we'll add a reference URI to our document. Full code:Appendix D, Code for Add Attribute Example.

A `reference` is a child of the `story` element, so finding the place to put our new element and attribute is simple. As soon as we do the error-checking test in our `parseDoc`, we are in the right spot to add our element. But before we do that, we need to make a declaration using a data type we have not seen yet:

    	xmlAttrPtr newattr;

We also need an extra xmlNodePtr:

    	xmlNodePtr newnode;

The rest of `parseDoc` is the same as before until we check to see if our root element is `story`. If it is, then we know we are at the right spot to add our element:

    	 newnode = xmlNewTextChild (cur, NULL, "reference", NULL);
    	 newattr = xmlNewProp (newnode, "uri", uri);

| First we add a new node at the location of the current node pointer, `cur.` using the xmlNewTextChild function.

Once the node is added, the file is written to disk just as in the previous example in which we added an element with text content.

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