500 struct _xmlNode {  struct
504     struct _xmlNode *children;	/* parent->childs link */  argument
505     struct _xmlNode *last;	/* last child link */  argument
506     struct _xmlNode *parent;	/* child->parent link */  argument
507     struct _xmlNode *next;	/* next sibling link  */  argument
508     struct _xmlNode *prev;	/* previous sibling link  */  argument
509     struct _xmlDoc  *doc;	/* the containing document */
512     xmlNs           *ns;        /* pointer to the associated namespace */
513     xmlChar         *content;   /* the content */
514     struct _xmlAttr *properties;/* properties list */
515     xmlNs           *nsDef;     /* namespace definitions on this node */
516     void            *psvi;	/* for type/PSVI information */
517     unsigned short   line;	/* line number */
518     unsigned short   extra;	/* extra data for XPath/XSLT */