class_docstr: `RSL <http://en.wikipedia.org/wiki/RAISE>`_ is the formal specification
  language used in RAISE (Rigorous Approach to Industrial Software Engineering)
  method.
  
  .. versionadded:: 2.0
class_docstr_tok: ["`","RSL","<","http",":","\/\/en.wikipedia.org\/wiki\/RAISE",">","`","_","is","the","formal","specification","language","used","in","RAISE","(","Rigorous","Approach","to","Industrial","Software","Engineering",")","method",".","..","versionadded",":",":","2.0"]
docstr: Check for the most common text in the beginning of a RSL file.
docstr_tok: ["Check","for","the","most","common","text","in","the","beginning","of","a","RSL","file","."]
code: def analyse_text(text):
      """
      Check for the most common text in the beginning of a RSL file.
      """
      if (
          re.search(r"scheme\s*.*?=\s*class\s*type", text, re.I)
          is not None
      ):
          return 1.0
  
imports: import re
  from pygments.lexer import ExtendedRegexLexer, RegexLexer, bygroups, words, include, default, this, using, combined
  from pygments.token import Text, Comment, Operator, Keyword, Name, String, Number, Punctuation, Literal, Whitespace
label_desc: Use image node_id 1 for calling the RslLexer obj's underlying member method code with example usage: obj.analyse_text(text) and returns: int