class_docstr: Class for reading and processing standard format marker files and strings.
class_docstr_tok: ["Class","for","reading","and","processing","standard","format","marker","files","and","strings","."]
docstr: Open a standard format marker string for sequential reading.
  
  :param s: string to parse as a standard format marker input file
  :type s: str
docstr_tok: ["Open","a","standard","format","marker","string","for","sequential","reading",".",":","param","s",":","string","to","parse","as","a","standard","format","marker","input","file",":","type","s",":","str"]
code: def open_string(self, s):
      """
      Open a standard format marker string for sequential reading.
  
      :param s: string to parse as a standard format marker input file
      :type s: str
      """
      self._file = StringIO(s)
  
imports: import codecs
  import re
  from io import StringIO
  from xml.etree.ElementTree import Element, ElementTree, SubElement, TreeBuilder
  from nltk.data import PathPointer, find
label_desc: Use image node_id 3 for calling the StandardFormat obj's underlying member method code with example usage: obj.open_string(s) without return types