class_docstr: Internal class to parse XML into DataFrames with the Python
  standard library XML module: `xml.etree.ElementTree`.
docstr: Notes
  -----
  `etree` supports limited XPath. If user attempts a more complex
  expression syntax error will raise.
code: def _validate_path(self) -> list[Any]:
      """
      Notes
      -----
      `etree` supports limited XPath. If user attempts a more complex
      expression syntax error will raise.
      """
  
      msg = (
          "xpath does not return any nodes or attributes. "
          "Be sure to specify in `xpath` the parent nodes of "
          "children and attributes to parse. "
          "If document uses namespaces denoted with "
          "xmlns, be sure to define namespaces and "
          "use them in xpath."
      )
      try:
          elems = self.xml_doc.findall(
              self.xpath, namespaces=self.namespaces
          )
          children = [ch for el in elems for ch in el.findall("*")]
          attrs = {k: v for el in elems for k, v in el.attrib.items()}
  
          if elems is None:
              raise ValueError(msg)
  
          if elems is not None:
              if self.elems_only and children == []:
                  raise ValueError(msg)
              if self.attrs_only and attrs == {}:
                  raise ValueError(msg)
              if children == [] and attrs == {}:
                  raise ValueError(msg)
  
      except (KeyError, SyntaxError):
          raise SyntaxError(
              "You have used an incorrect or unsupported XPath "
              "expression for etree library or you used an "
              "undeclared namespace prefix."
          )
  
      return elems
  
imports: from __future__ import annotations
  import io
  from typing import Any, Callable, Sequence
  from pandas._libs import lib
  from pandas._typing import TYPE_CHECKING, CompressionOptions, ConvertersArg, DtypeArg, DtypeBackend, FilePath, ParseDatesArg, ReadBuffer, StorageOptions, XMLParsers
  from pandas.compat._optional import import_optional_dependency
  from pandas.errors import AbstractMethodError, ParserError
  from pandas.util._decorators import doc
  from pandas.util._validators import check_dtype_backend
  from pandas.core.dtypes.common import is_list_like
  from pandas.core.shared_docs import _shared_docs
  from pandas.io.common import file_exists, get_handle, infer_compression, is_fsspec_url, is_url, stringify_path
  from pandas.io.parsers import TextParser
label_desc: Use image node_id 2 for calling the _EtreeFrameParser obj's underlying member method code with example usage: obj._validate_path() and returns: elems