Retrieving Attributes

Retrieving Attributes
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+Retrieving the value of an attribute is similar to the previous + example in which we retrieved a node's text contents. In this case we'll + extract the value of the URI we added in the previous + section. Full code: Appendix G, Code for Retrieving Attribute Value Example.

+ The initial steps for this example are similar to the previous ones: parse + the doc, find the element you are interested in, then enter a function to + carry out the specific task required. In this case, we call + getReference: +

+void
+getReference (xmlDocPtr doc, xmlNodePtr cur) {
+
+	xmlChar *uri;
+	cur = cur->xmlChildrenNode;
+	while (cur != NULL) {
+	    if ((!xmlStrcmp(cur->name, (const xmlChar *)"reference"))) {
+		    uri = xmlGetProp(cur, "uri");
+		    printf("uri: %s\n", uri);
+		    xmlFree(uri);
+	    }
+	    cur = cur->next;
+	}
+	return;
+}
+

+ +

+ The key function is xmlGetProp, which returns an + xmlChar containing the attribute's value. In this case, + we just print it out. +

	Note
	+ If you are using a DTD that declares a fixed or + default value for the attribute, this function will retrieve it. +

+ +

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