<relatedItem>

<relatedItem> contains or references some other bibliographic item which is related to the present one in some specified manner, for example as a constituent or alternative version of it. [3.11.2.7 Related Items]
Modulecore — Elements Available in All TEI Documents
Attributesatt.global (@xml:id, @n, @xml:lang, @xml:base, @xml:space) (att.global.rendition (@rend, @style, @rendition)) (att.global.linking (@corresp, @synch, @sameAs, @copyOf, @next, @prev, @exclude, @select)) (att.global.analytic (@ana)) (att.global.facs (@facs)) (att.global.change (@change)) (att.global.responsibility (@cert, @resp)) att.typed (@type, @subtype)
targetpoints to the related bibliographic element by means of an absolute or relative URI reference
Status Optional
Datatype 

<rng:ref name="data.pointer"/>
data.pointer
Member of
model.biblPart
Contained by
core: bibl biblStruct
header: notesStmt
May contain
core: bibl biblStruct listBibl ptr ref
header: biblFull
msdescription: msDesc
Declaration

<rng:element name="relatedItem">
 <rng:ref name="att.global.attributes"/>
 <rng:ref name="att.global.rendition.attributes"/>
 <rng:ref name="att.global.linking.attributes"/>
 <rng:ref name="att.global.analytic.attributes"/>
 <rng:ref name="att.global.facs.attributes"/>
 <rng:ref name="att.global.change.attributes"/>
 <rng:ref name="att.global.responsibility.attributes"/>
 <rng:ref name="att.typed.attributes"/>
 <rng:optional>
  <rng:attribute name="target">
   <rng:ref name="data.pointer"/>
  </rng:attribute>
 </rng:optional>
 <rng:optional>
  <rng:choice>
   <rng:ref name="model.biblLike"/>
   <rng:ref name="model.ptrLike"/>
  </rng:choice>
 </rng:optional>
</rng:element>
element relatedItem
{
   att.global.attributes,
   att.global.rendition.attributes,
   att.global.linking.attributes,
   att.global.analytic.attributes,
   att.global.facs.attributes,
   att.global.change.attributes,
   att.global.responsibility.attributes,
   att.typed.attributes,
   attribute target { data.pointer }?,
   ( model.biblLike | model.ptrLike )?
}
Schematron

<sch:report test="@target and count( child::* ) > 0">If the @target attribute on <sch:name/> is used, the
relatedItem element must be empty</sch:report>
<sch:assert test="@target or child::*">A relatedItem element should have either a 'target' attribute
or a child element to indicate the related bibliographic item</sch:assert>
Example
<biblStruct>
 <monogr>
  <author>Shirley, James</author>
  <title type="main">The gentlemen of Venice</title>
  <imprint>
   <pubPlace>New York</pubPlace>
   <publisher>Readex Microprint</publisher>
   <date>1953</date>
  </imprint>
  <extent>1 microprint card, 23 x 15 cm.</extent>
 </monogr>
 <series>
  <title>Three centuries of drama: English, 1642–1700</title>
 </series>
 <relatedItem type="otherForm">
  <biblStruct>
   <monogr>
    <author>Shirley, James</author>
    <title type="main">The gentlemen of Venice</title>
    <title type="sub">a tragi-comedie presented at the private house in Salisbury
         Court by Her Majesties servants</title>
    <imprint>
     <pubPlace>London</pubPlace>
     <publisher>H. Moseley</publisher>
     <date>1655</date>
    </imprint>
    <extent>78 p.</extent>
   </monogr>
  </biblStruct>
 </relatedItem>
</biblStruct>
Note

If the target attribute is used to reference the related bibliographic item, the element should be empty.