{
    "mode": "perldoc",
    "parameter": "XML::DOM::Element",
    "section": "",
    "url": "https://www.chedong.com/phpMan.php/perldoc/XML%3A%3ADOM%3A%3AElement/json",
    "generated": "2026-06-11T10:58:23Z",
    "sections": {
        "NAME": {
            "content": "XML::DOM::Element - An XML element node in XML::DOM\n",
            "subsections": []
        },
        "DESCRIPTION": {
            "content": "XML::DOM::Element extends XML::DOM::Node.\n\nBy far the vast majority of objects (apart from text) that authors encounter when traversing a\ndocument are Element nodes. Assume the following XML document:\n\n<elementExample id=\"demo\">\n<subelement1/>\n<subelement2><subsubelement/></subelement2>\n</elementExample>\n\nWhen represented using DOM, the top node is an Element node for \"elementExample\", which contains\ntwo child Element nodes, one for \"subelement1\" and one for \"subelement2\". \"subelement1\" contains\nno child nodes.\n\nElements may have attributes associated with them; since the Element interface inherits from\nNode, the generic Node interface method getAttributes may be used to retrieve the set of all\nattributes for an element. There are methods on the Element interface to retrieve either an Attr\nobject by name or an attribute value by name. In XML, where an attribute value may contain\nentity references, an Attr object should be retrieved to examine the possibly fairly complex\nsub-tree representing the attribute value. On the other hand, in HTML, where all attributes have\nsimple string values, methods to directly access an attribute value can safely be used as a\nconvenience.\n\nMETHODS\ngetTagName\nThe name of the element. For example, in:\n\n<elementExample id=\"demo\">\n...\n</elementExample>\n\ntagName has the value \"elementExample\". Note that this is case-preserving in XML, as are all\nof the operations of the DOM.\n\ngetAttribute (name)\nRetrieves an attribute value by name.\n\nReturn Value: The Attr value as a string, or the empty string if that attribute does not\nhave a specified or default value.\n\nsetAttribute (name, value)\nAdds a new attribute. If an attribute with that name is already present in the element, its\nvalue is changed to be that of the value parameter. This value is a simple string, it is not\nparsed as it is being set. So any markup (such as syntax to be recognized as an entity\nreference) is treated as literal text, and needs to be appropriately escaped by the\nimplementation when it is written out. In order to assign an attribute value that contains\nentity references, the user must create an Attr node plus any Text and EntityReference\nnodes, build the appropriate subtree, and use setAttributeNode to assign it as the value of\nan attribute.\n\nDOMExceptions:\n\n*   INVALIDCHARACTERERR\n\nRaised if the specified name contains an invalid character.\n\n*   NOMODIFICATIONALLOWEDERR\n\nRaised if this node is readonly.\n\nremoveAttribute (name)\nRemoves an attribute by name. If the removed attribute has a default value it is immediately\nreplaced.\n\nDOMExceptions:\n\n*   NOMODIFICATIONALLOWEDERR\n\nRaised if this node is readonly.\n\ngetAttributeNode\nRetrieves an Attr node by name.\n\nReturn Value: The Attr node with the specified attribute name or undef if there is no such\nattribute.\n\nsetAttributeNode (attr)\nAdds a new attribute. If an attribute with that name is already present in the element, it\nis replaced by the new one.\n\nReturn Value: If the newAttr attribute replaces an existing attribute with the same name,\nthe previously existing Attr node is returned, otherwise undef is returned.\n\nDOMExceptions:\n\n*   WRONGDOCUMENTERR\n\nRaised if newAttr was created from a different document than the one that created the\nelement.\n\n*   NOMODIFICATIONALLOWEDERR\n\nRaised if this node is readonly.\n\n*   INUSEATTRIBUTEERR\n\nRaised if newAttr is already an attribute of another Element object. The DOM user must\nexplicitly clone Attr nodes to re-use them in other elements.\n\nremoveAttributeNode (oldAttr)\nRemoves the specified attribute. If the removed Attr has a default value it is immediately\nreplaced. If the Attr already is the default value, nothing happens and nothing is returned.\n\nParameters: *oldAttr* The Attr node to remove from the attribute list.\n\nReturn Value: The Attr node that was removed.\n\nDOMExceptions:\n\n*   NOMODIFICATIONALLOWEDERR\n\nRaised if this node is readonly.\n\n*   NOTFOUNDERR\n\nRaised if oldAttr is not an attribute of the element.\n",
            "subsections": [
                {
                    "name": "Additional methods not in the DOM Spec",
                    "content": "setTagName (newTagName)\nSets the tag name of the Element. Note that this method is not portable between DOM\nimplementations.\n\nDOMExceptions:\n\n*   INVALIDCHARACTERERR\n\nRaised if the specified name contains an invalid character.\n\ncheck ($checker)\nUses the specified XML::Checker to validate the document. NOTE: an XML::Checker must be\nsupplied. The checker can be created in different ways, e.g. when parsing a document with\nXML::DOM::ValParser, or with XML::DOM::Document::createChecker(). See XML::Checker for more\ninfo.\n"
                }
            ]
        }
    },
    "summary": "XML::DOM::Element - An XML element node in XML::DOM",
    "flags": [],
    "examples": [],
    "see_also": []
}