EAD Tag Library for Version 1.0

EAD Elements: <unitdate> Date of the Unit

Description:

The creation year, month, or day of the described materials. The <unitdate> may be in the form of text or numbers, and may consist of a single date or range of dates. As an important subelement of the Descriptive Identification <did>, the <unitdate> is used to tag only the creation dates of the materials described in the encoded finding aid. Do not confuse it with the <date> element, which is used to tag all other dates.

A standard numeric form of the date (YYYYMMDD, etc.) can be specified with the NORMAL attribute to facilitate machine comparison of dates for search purposes. The TYPE attribute may be used to indicate whether the <unitdate> represents inclusive dates; bulk or predominant dates; or a single date. The CERTAINTY attribute may be applied to indicate if the date has been supplied or estimated by the archivist.

The <unitdate> may be nested within the <unittitle> or used independently of that element. Generally, if a description of a Component <c> consists of nothing but the <unitdate>, the string is tagged as a <unitdate> nested inside a <unittitle>, e.g.:

	<c04><did><unittitle><unitdate>1950-1961</unitdate>
	</unittitle></did></c04>

May contain:

#PCDATA, abbr, archref, bibref, emph, expan, extptr, extref, lb, linkgrp, ptr, ref, title

May occur within:

archref, dentry, did, entry, event, extref, extrefloc, item, label, p, ref, refloc, unittitle

Attributes:

ALTRENDER	#IMPLIED, CDATA
AUDIENCE	#IMPLIED, external, internal
CERTAINTY	#IMPLIED, CDATA
ENCODINGANALOG	#IMPLIED, CDATA
ID	#IMPLIED, ID
LABEL	#IMPLIED, CDATA
NORMAL	#IMPLIED, CDATA
TYPE	#IMPLIED, bulk, inclusive, single

Examples:

<dsc type="analyticover">
[other possible elements and text... ]
<c level="subseries">
<did>
<unittitle>Documentary Movies, <unitdate type="inclusive">1952-1964
</unitdate></unittitle>
<physdesc><extent>2.5 linear ft.</extent></physdesc>
<abstract>Includes scores, arranged alphabetically by movie title, and some correspondence,
arranged chronologically.</abstract>
</did>
[other possible elements and text... ]
</c>
[other possible elements and text... ]
</dsc>

<archdesc level="collection">
<did><head>Collection Summary</head>
<origination label="Creator"><corpname encodinganalog="110">National
Association for the Advancement of Colored People</corpname></origination>
<unittitle label="Title" encodinganalog="245">Visual Materials from the National
Association for the Advancement of Colored People Records (Library of Congress)</unittitle>
<unitdate label="Dates" type="inclusive" encodinganalog="260">ca. 1838-1969, bulk
1944-1955</unitdate>
[other possible elements and text... ]
</did>
[other possible elements and text... ]
</archdesc>

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