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# XPath Nodes * * * ## XPath Terms ### Node In XPath, there are seven types of nodes: elements, attributes, text, namespaces, processing instructions, comments, and document (root) nodes. An XML document is treated as a node tree. The root of the tree is called the document node or root node. Take a look at the following XML document: J K. Rowling 2005 29.99 Examples of nodes in the above XML document: (Document node) J K. Rowling (Element node) lang="en" (Attribute node) ### Atomic Value An atomic value is a node that has no parent or child. Examples of atomic values: J K. Rowling "en" ### Item An item is either an atomic value or a node. * * * ## Node Relationships ### Parent Every element and attribute has a parent. In the example below, the book element is the parent of the title, author, year, and price elements: J K. Rowling 2005 29.99 ### Children An element node can have zero, one, or more children. In the example below, the title, author, year, and price elements are all children of the book element: J K. Rowling 2005 29.99 ### Sibling Nodes that have the same parent. In the example below, the title, author, year, and price elements are all siblings: J K. Rowling 2005 29.99 ### Ancestor The parent, grandparent, etc., of a node. In the example below, the ancestors of the title element are the book element and the bookstore element: J K. Rowling 2005 29.99 ### Descendant The children, grandchildren, etc., of a node. In the example below, the descendants of the bookstore element are the book, title, author, year, and price elements: J K. Rowling 2005 29.99 AI is thinking... [](#)(#) (#)[](#) [Byte Arch Coding Plan supports mainstream large models such as Doubao, GLM, DeepSeek, Kimi, MiniMax, official supply is stable and reliable. ¥9.9 / month immediately open](https://maas.xfyun.cn/modelSquare?ch=maas_lm_l2E)