def METHOD_NAME(self):
    my_analyzer = RegexTokenizer("[a-zA-Z_]+") | LowercaseFilter() | StopFilter()
    METHOD_NAME = Schema(
        h=TEXT(stored=True, analyzer=my_analyzer),
        gnx=ID(stored=True), b=TEXT(analyzer=my_analyzer),
        parent=ID(stored=True),
        doc=ID(stored=True),
    )
    return METHOD_NAME