CML simpleType idType

Type Heirarchy
{http://www.w3.org/2001/XMLSchema}string (by restriction) {http://www.xml-cml.org/schema/cml2/core}idType

Derived Types
{http://www.xml-cml.org/schema/cml2/core}idType {http://www.xml-cml.org/schema/cml2/core}refType (by restriction)

Target Namespace	http://www.xml-cml.org/schema/cml2/core
Declared Namespaces	xmlns:val=http://www.w3.org/1999/XSL/TransformX xmlns:stm=http://www.xml-cml.org/schema/stmml xmlns:xsd=http://www.w3.org/2001/XMLSchema xmlns:xlink=http://www.w3.org/1999/xlink xmlns:cml=http://www.xml-cml.org/schema/cml2/core xmlns=http://www.xml-cml.org/schema/cml2/core

<xsd:simpleType name="idType" id="st.idType">
    <xsd:annotation>
        <xsd:documentation>
            <div class="summary">A unique ID for an element.</div>
            <div class="description">
                <p>
This is not formally
of type ID (an XML NAME which must start with a letter and contain only letters,
digits and
                    <tt>.-_:</tt>
). It is recommended that IDs start with a letter,
and contain no punctuation or whitespace. The function
                    <tt>generate-id()</tt>
in XSLT will generate semantically void unique IDs.
</p>
                <p>
It is difficult to ensure uniqueness when documents are merged. We suggest
namespacing IDs, perhaps using the containing elements as the base.
Thus
                    <tt>mol3:a1</tt>
could be a useful unique ID.
However this is still experimental.
                </p>
            </div>
        </xsd:documentation>
    </xsd:annotation>
    <xsd:restriction base="xsd:string">
        <xsd:pattern value="([A-Za-z][A-Za-z0-9_-]*:)?[A-Za-z][A-Za-z0-9_\-\.]*"/>
    </xsd:restriction>
</xsd:simpleType>

This is not formally of type ID (an XML NAME which must start with a letter and contain only letters, digits and .-_:). It is recommended that IDs start with a letter, and contain no punctuation or whitespace. The function generate-id() in XSLT will generate semantically void unique IDs.

It is difficult to ensure uniqueness when documents are merged. We suggest namespacing IDs, perhaps using the containing elements as the base. Thus mol3:a1 could be a useful unique ID. However this is still experimental.

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simpleType {http://www.xml-cml.org/schema/cml2/core}idType

Source

Documentation