Example: <constraint> (constraint rules)
These search results reproduce every example of the use of <constraint> in the Guidelines, including all localised and translated versions. In some cases, the examples have been drawn from discussion of other elements in the Guidelines and illustrating the use of <constraint> is not the main focus of the passage in question. In other cases, examples may be direct translations of each other, and hence identical from the perspective of their encoding.
22 Documentation Elements
<constraintSpec ident="reforkeyorname"
scheme="schematron">
<constraint>
<sch:assert test="@ref or @key or @name">One of the
attributes 'name', 'ref' or 'key' must be supplied</sch:assert>
</constraint>
</constraintSpec>
<constraintSpec ident="activemutual"
scheme="schematron">
<constraint>
<sch:report test="@active and @mutual">Only one of the
attributes @active and @mutual may be supplied</sch:report>
</constraint>
</constraintSpec>
<constraintSpec ident="activepassive"
scheme="schematron">
<constraint>
<sch:report test="@passive and not(@active)">the
attribute 'passive' may be supplied only if the attribute 'active' is supplied</sch:report>
</constraint>
</constraintSpec>
scheme="schematron">
<constraint>
<sch:assert test="@ref or @key or @name">One of the
attributes 'name', 'ref' or 'key' must be supplied</sch:assert>
</constraint>
</constraintSpec>
<constraintSpec ident="activemutual"
scheme="schematron">
<constraint>
<sch:report test="@active and @mutual">Only one of the
attributes @active and @mutual may be supplied</sch:report>
</constraint>
</constraintSpec>
<constraintSpec ident="activepassive"
scheme="schematron">
<constraint>
<sch:report test="@passive and not(@active)">the
attribute 'passive' may be supplied only if the attribute 'active' is supplied</sch:report>
</constraint>
</constraintSpec>
<constraintSpec ident="subclauses"
scheme="schematron">
<constraint>
<sch:ns prefix="tei"
uri="http://www.tei-c.org/ns/1.0"/>
<sch:rule context="tei:div">
<sch:report test="count( tei:div ) eq 1">if it contains any subdivisions, a
division must contain at least two of them</sch:report>
</sch:rule>
</constraint>
</constraintSpec>
scheme="schematron">
<constraint>
<sch:ns prefix="tei"
uri="http://www.tei-c.org/ns/1.0"/>
<sch:rule context="tei:div">
<sch:report test="count( tei:div ) eq 1">if it contains any subdivisions, a
division must contain at least two of them</sch:report>
</sch:rule>
</constraint>
</constraintSpec>
<constraintSpec ident="introtitle"
scheme="schematron">
<constraint>
<sch:assert test="tei:fileDesc/tei:titleStmt/tei:title[@type='introductory']"> an introductory component
of the title is expected </sch:assert>
</constraint>
</constraintSpec>
<constraintSpec ident="maintitle"
scheme="schematron">
<constraint>
<sch:assert test="tei:fileDesc/tei:titleStmt/tei:title[@type='main']"> a main title must be supplied
</sch:assert>
</constraint>
</constraintSpec>
scheme="schematron">
<constraint>
<sch:assert test="tei:fileDesc/tei:titleStmt/tei:title[@type='introductory']"> an introductory component
of the title is expected </sch:assert>
</constraint>
</constraintSpec>
<constraintSpec ident="maintitle"
scheme="schematron">
<constraint>
<sch:assert test="tei:fileDesc/tei:titleStmt/tei:title[@type='main']"> a main title must be supplied
</sch:assert>
</constraint>
</constraintSpec>
<constraintSpec ident="alt"
scheme="schematron">
<constraint>
<sch:ns prefix="tei"
uri="http://www.tei-c.org/ns/1.0"/>
<sch:pattern id="altTags">
<sch:rule context="tei:figure">
<sch:report test="not(tei:figDesc or tei:head)"> You should provide information in a figure from
which we can construct an alt attribute in HTML </sch:report>
</sch:rule>
</sch:pattern>
</constraint>
</constraintSpec>
scheme="schematron">
<constraint>
<sch:ns prefix="tei"
uri="http://www.tei-c.org/ns/1.0"/>
<sch:pattern id="altTags">
<sch:rule context="tei:figure">
<sch:report test="not(tei:figDesc or tei:head)"> You should provide information in a figure from
which we can construct an alt attribute in HTML </sch:report>
</sch:rule>
</sch:pattern>
</constraint>
</constraintSpec>
<constraintSpec ident="tables"
scheme="schematron">
<constraint>
<sch:ns prefix="tei"
uri="http://www.tei-c.org/ns/1.0"/>
<sch:pattern id="Tables">
<sch:rule context="tei:table">
<sch:assert test="tei:head">A <table> should have a caption, using a <head>
element</sch:assert>
<sch:report test="parent::tei:body">Do not use tables to lay out the document body</sch:report>
</sch:rule>
</sch:pattern>
</constraint>
</constraintSpec>
scheme="schematron">
<constraint>
<sch:ns prefix="tei"
uri="http://www.tei-c.org/ns/1.0"/>
<sch:pattern id="Tables">
<sch:rule context="tei:table">
<sch:assert test="tei:head">A <table> should have a caption, using a <head>
element</sch:assert>
<sch:report test="parent::tei:body">Do not use tables to lay out the document body</sch:report>
</sch:rule>
</sch:pattern>
</constraint>
</constraintSpec>
<constraintSpec ident="title_ne_author"
scheme="SPITBOL">
<constraint> (output = leq(title,author) "title and author cannot be the same") </constraint>
</constraintSpec>
scheme="SPITBOL">
<constraint> (output = leq(title,author) "title and author cannot be the same") </constraint>
</constraintSpec>
<attDef ident="ageAtDeath">
<desc>age in years at death</desc>
<datatype>
<dataRef key="teidata.count"/>
</datatype>
<constraintSpec ident="lessThan150"
scheme="schematron">
<constraint>
<sch:report test=". >= 150"> age at death must be an integer less than 150 </sch:report>
</constraint>
</constraintSpec>
</attDef>
<desc>age in years at death</desc>
<datatype>
<dataRef key="teidata.count"/>
</datatype>
<constraintSpec ident="lessThan150"
scheme="schematron">
<constraint>
<sch:report test=". >= 150"> age at death must be an integer less than 150 </sch:report>
</constraint>
</constraintSpec>
</attDef>
<constraintSpec ident="isoconstraint"
scheme="schematron">
<constraint>
<sch:assert test="tei:fileDesc/tei:titleStmt/tei:title[@type='main']"> a main title must be supplied
</sch:assert>
</constraint>
</constraintSpec>
scheme="schematron">
<constraint>
<sch:assert test="tei:fileDesc/tei:titleStmt/tei:title[@type='main']"> a main title must be supplied
</sch:assert>
</constraint>
</constraintSpec>
<constraintSpec ident="local"
scheme="private">
<constraint>
(output = (ident(title) ident(author) "You must supply a title or an author"))
</constraint>
</constraintSpec>
scheme="private">
<constraint>
(output = (ident(title) ident(author) "You must supply a title or an author"))
</constraint>
</constraintSpec>
<constraintSpec ident="demo-c1"
scheme="schematron">
<desc>Enforce the presence of the <att>spanTo</att> attribute</desc>
<constraint>
<sch:assert test="@spanTo">The spanTo= attribute of <sch:name/>
is required.</sch:assert>
</constraint>
</constraintSpec>
scheme="schematron">
<desc>Enforce the presence of the <att>spanTo</att> attribute</desc>
<constraint>
<sch:assert test="@spanTo">The spanTo= attribute of <sch:name/>
is required.</sch:assert>
</constraint>
</constraintSpec>
<constraintSpec ident="demo-c2"
scheme="schematron">
<desc>Implement an accessibility rule which says that pictures
should have textual explanations</desc>
<constraint>
<sch:report test="not(tei:figDesc or tei:head)"> You should
provide information in a figure from which
we can construct an alt attribute in HTML </sch:report>
</constraint>
</constraintSpec>
scheme="schematron">
<desc>Implement an accessibility rule which says that pictures
should have textual explanations</desc>
<constraint>
<sch:report test="not(tei:figDesc or tei:head)"> You should
provide information in a figure from which
we can construct an alt attribute in HTML </sch:report>
</constraint>
</constraintSpec>