Signal 

Human Signal
A perceptible change in an environmental factor that can be used to transfer meaning. The basic function of such signals is to provide the change of a single environmental factor to attract attention and to transfer meaning. The vocalization of language is a clear example.

Complex Type Information

Model

Attributes

QName Type Fixed Default Use Inheritable Annotation
fromDate xs:dateTime required
humlName xs:string required
humlName xs:string required
id xs:ID required
id xs:ID required
toDate xs:dateTime required

Source 

<xs:complexType name="Signal" abstract="true">
  <xs:annotation>
    <xs:documentation xml:lang="en">Human Signal A perceptible change in an environmental factor that can be used to transfer meaning. The basic function of such signals is to provide the change of a single environmental factor to attract attention and to transfer meaning. The vocalization of language is a clear example.</xs:documentation>
    <xs:appinfo>NONE</xs:appinfo>
  </xs:annotation>
  <xs:attributeGroup ref="humlTemporalAtts"/>
  <xs:attributeGroup ref="humlCommAtts"/>
</xs:complexType>