<index>	(index entry) marks a location to be indexed for whatever purpose.
Attributes:	index (index number) indicates which index (of several) the index entry belongs to. Datatype: CDATA Values: any string of characters; valid values are application-dependent. Default: #IMPLIED Note This attribute makes it possible to create multiple indices for a text. level1 (first-level index entry) gives the form under which the index entry is to be made. Datatype: CDATA Values: any string of characters. Default: #REQUIRED Note At least one level of entry is required. level2 (second-level index entry) gives the second-level form, if any. Datatype: CDATA Values: any string of characters. Default: #IMPLIED level3 (third-level index entry) gives the third-level form, if any. Datatype: CDATA Values: any string of characters. Default: #IMPLIED level4 (fourth-level index entry) gives the fourth-level form, if any. Datatype: CDATA Values: any string of characters. Default: #IMPLIED
Example	David's other principal backer, Josiah ha-Kohen <index level1='Josiah ha-Kohen b. Azarya' level2='cousin and backer of David b. Daniel'> b. Azarya, son of one of the last gaons of Sura, <index level1='Azarya' level2='gaon of Sura'> <index level1='Sura'> was David's own first cousin.
Tagset	additional tag set for common core features
Class	metadata [and indirectly also:] globincl
Filename	teicore2
Content:	Empty.
Parents	[none]
Children	[none]
Declaration	<!ELEMENT index - O EMPTY > <!ATTLIST index %a.global index CDATA #IMPLIED level1 CDATA #REQUIRED level2 CDATA #IMPLIED level3 CDATA #IMPLIED level4 CDATA #IMPLIED >
See	6.8.2