rail:text 

could be the instructions to drivers, used by an AVL (de:RBL) system, or the message on printouts

http://wiki.railml.org/index.php?title=TT:text_annotation

Element Information

Model

Attributes

QName Type Fixed Default Use Inheritable Annotation
xml:lang xs:language optional 
In due course, we should install the relevant ISO 2- and 3-letter
codes as the enumerated possible values . . .
Wildcard: ANY attribute from ANY namespace OTHER than 'http://www.railml.org/schemas/2016'

Source 

<xs:element name="text" type="rail:tAnnotationText" maxOccurs="unbounded">
  <xs:annotation>
    <xs:documentation>could be the instructions to drivers, used by an AVL (de:RBL) system, or the message on printouts</xs:documentation>
    <xs:documentation source="http://wiki.railml.org/index.php?title=TT:text_annotation"/>
  </xs:annotation>
</xs:element>

Sample