<?xml version=“1.0” encoding=“UTF-8”?> <xsd:schema xmlns:xsd=“www.w3.org/2001/XMLSchema”
targetNamespace="http://www.crossref.org/clinicaltrials.xsd" xmlns="http://www.crossref.org/clinicaltrials.xsd"> <xsd:annotation> <xsd:documentation> Linked Clinical Trials is a CrossRef initiative helping to connect the published literature to registered clinical trials associated with the research, - version 1.0 (initial release) September 24, 2015 </xsd:documentation> </xsd:annotation> <xsd:element name="program"> <xsd:annotation> <xsd:documentation>Accommodates deposit of linked clincal trials metadata. The clinical-trial-number value will be a string that must match a specific pattern appropriate for a given clinical trial registry. The registry is identified in the required attribute 'registry' and must be the DOI of a recognized registry (see http://dx.doi.org/10.18810/registries) </xsd:documentation> </xsd:annotation> <xsd:complexType> <xsd:sequence> <xsd:element ref="clinical-trial-number" minOccurs="0" maxOccurs="unbounded"/> </xsd:sequence> </xsd:complexType> </xsd:element> <xsd:element name="clinical-trial-number"> <xsd:complexType mixed="true"> <xsd:attribute name="registry" use="required"> <xsd:annotation> <xsd:documentation> The clinical trial identifier related to the article. </xsd:documentation> </xsd:annotation> <xsd:simpleType> <xsd:restriction base="xsd:string"> <xsd:maxLength value="200"/> <xsd:minLength value="12"/> <xsd:pattern value="10.18810/[a-z-]+"/> </xsd:restriction> </xsd:simpleType> </xsd:attribute> <xsd:attribute name="type" use="optional"> <xsd:annotation> <xsd:documentation> Used to identify the article publication date in relation to the issuance of the trial results </xsd:documentation> </xsd:annotation> <xsd:simpleType> <xsd:restriction base="xsd:string"> <xsd:enumeration value="preResults"/> <xsd:enumeration value="results"/> <xsd:enumeration value="postResults"/> </xsd:restriction> </xsd:simpleType> </xsd:attribute> </xsd:complexType> </xsd:element>
</xsd:schema>