Icarus Class: AttrIndexMetaphor
Contains all the information required to index the value of an XML attribute.
attrName Attribute may stay unnamed in attribute list.Attribute value must be specified.
  The name of the XML attribute for which this indexing metaphor has been written.
indexField Attribute is multivalued (list). SrsField Attribute value must be specified.
  Specifies the library field(s) into which the attribute's contents will be indexed. In the case of "conditional" indexing, this attribute specifies a list of eligible fields into which the content of the attribute may be indexed. In this case, the data for any given attribute may only be indexed into ONE of the eligible fields.
ofSubentry Attribute is multivalued (list). Library  
  Used to indicate that this attribute belongs to the specified subentry library. For the data to be indexed correctly, the ancestor element that delimits the subentry library must have the correct 'subentry' attribute (e.g. subentry:).
split  
  An optional attribute used to specify a regular expression containing a set of characters used to split the content of the element into substrings which are indexed separately.
token  
  If a valid "syntax" attribute is provided, this attribute specifies the name of the parser production in the syntax file to be used for "micro-parsing" the content of the element.
conditionField Field  
  If valid "syntax" and "conditionToken" attributes are provided, this attribute specifies a field that is used to conditionally index the content of the element into one of the eligible target fields specified in the 'indexField' attribute list. The 'loadPath' attribute of the condition field identifies the element or attribute whose content will be passed to the parser production that determines which target field will receive the data to be indexed.
conditionToken  
  If valid "syntax" and "conditionField" attributes are provided, this attribute specifies the name of the parser production in the syntax file to be used for "conditionally indexing" the content of the element.