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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
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-->
<sect1 id="xmlxmla"><title>XML for Analysis Provider</title>
<para>XML for Analysis (XMLA) is a SOAP based XML API for data access
interaction between a client application and a data provider working over
the Web. The Virtuoso SOAP server can act as an XMLA data provider, also
the Virtuoso SOAP client can be used as a client to talk with an XMLA
data provider.</para>
<para>The following terms: result-set and row-set will be used
interchangeably to designate repeating content with identical structure.
The mention of a result-set and row-set in this document is related to an SQL/ODBC result set which is
represented as XML for use in XMLA.</para>
<para>The implementation is based on the
"XML for Analysis Specification v 1.0" by Microsoft Corp,
found on the <ulink url="http://msdn.microsoft.com/library/en-us/dnxmlspec/html/xmlanalysis.asp?frame=true">MSDN</ulink> website. </para>
<para>The XMLA protocol consists of two SOAP operations: "Discover"
and "Execute" which are described below:</para>
<para>The <emphasis>Discover</emphasis> operation is used to retrieve
settings and database object information. It accepts the following input
parameters: </para>
<simplelist>
<member><emphasis>RequestType</emphasis> - enumerated string.</member>
<member><emphasis>Restrictions</emphasis> - a structure of restrictions
to be applied to the processing of request, the type values may
vary, depending on the request.</member>
<member><emphasis>Properties</emphasis> - properties to the request,
such as data source name, initial catalog etc.</member>
</simplelist>
<para>Upon success the "Discover" operation will return a specific rowset.
The 'specific' means that its structure depends of type of request.</para>
<para>The XMLA data provider supports the following discovery rowsets:</para>
<simplelist>
<member><computeroutput>DISCOVER_DATASOURCES</computeroutput> - to discover available data sources</member>
<member><computeroutput>DISCOVER_PROPERTIES</computeroutput> - the properties which can be used/set</member>
<member><computeroutput>DISCOVER_SCHEMA_ROWSETS</computeroutput> - this list itself with allowed restrictions</member>
<member><computeroutput>DISCOVER_ENUMERATORS</computeroutput> - enumeration values supported by provider </member>
<member><computeroutput>DISCOVER_KEYWORDS</computeroutput> - reserved words </member>
<member><computeroutput>DISCOVER_LITERALS</computeroutput> - restrictions on database object names etc. </member>
<member><computeroutput>DBSCHEMA_CATALOGS</computeroutput> - list of catalogs</member>
<member><computeroutput>DBSCHEMA_TABLES</computeroutput> - list of tables</member>
<member><computeroutput>DBSCHEMA_TABLES_INFO</computeroutput> - list of info about tables</member>
<member><computeroutput>DBSCHEMA_COLUMNS</computeroutput> - list of columns</member>
<member><computeroutput>DBSCHEMA_PROVIDER_TYPES</computeroutput> - list of datatypes</member>
</simplelist>
<para>Here is an example of a response message to the Discover invocation:</para>
<programlisting><![CDATA[
----
<SOAP:Envelope SOAP:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP:Body>
<cli:DiscoverResponse xmlns:cli="urn:schemas-microsoft-com:xml-analysis">
<Result xmlns="">
<root xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<n0:schema xmlns:n0="http://www.w3.org/2001/XMLSchema"
targetNamespace="urn:schemas-microsoft-com:xml-analysis:rowset"
elementFormDefault="qualified">
<n0:element name="root" type="n2:root" xmlns:n2="urn:schemas-microsoft-com:xml-analysis:rowset"/>
... more declarations ...
</n0:schema>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
... rowset data ...
</row>
</root>
</Result>
</cli:DiscoverResponse>
</SOAP:Body>
</SOAP:Envelope>
----
]]></programlisting>
<para>The client can use information retrieved with the "Discover" operation for
automatically formulating queries etc.</para>
<para>The <emphasis>Execute</emphasis> operation is used to process
a SQL statement on the server and to return resultset or/and schema
description for the resultset. The current implementation supports only
SQL statements. It accepts the following input parameters:</para>
<simplelist>
<member><emphasis>Command</emphasis> - a structure with single
element - "Statement" , which contains the SQL statement.</member>
<member><emphasis>Properties</emphasis> - properties to the execution process.</member>
</simplelist>
<para>On success the "Execute" operation will return the rowset and/or XSD for
the rowset. </para>
<programlisting><![CDATA[
----
<SOAP:Envelope SOAP:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP:Body>
<cli:ExecuteResponse xmlns:cli="urn:schemas-microsoft-com:xml-analysis">
<Result xmlns="">
<root xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<n0:schema xmlns:n0="http://www.w3.org/2001/XMLSchema"
targetNamespace="urn:schemas-microsoft-com:xml-analysis:rowset"
elementFormDefault="qualified">
<n0:element name="root" type="n2:root" xmlns:n2="urn:schemas-microsoft-com:xml-analysis:rowset"/>
... more XSD declarations ...
</n0:schema>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
... rowset data ...
</row>
more <row> elements
</root>
</Result>
</cli:ExecuteResponse>
</SOAP:Body>
</SOAP:Envelope>
----
]]></programlisting>
<para>The XML representation of the result sets can have three forms: Tabular,
Multidimensional and Custom. As the Virtuoso server is a tabular data provider
itself, hence the current XMLA implementation supports only Tabular representation.</para>
<para>The Tabular representation of the result set consist of two main parts:</para>
<simplelist>
<member>schema - XML Schema definition of result</member>
<member>data - sequence of repeating elements, each consisting of elements representing the cells in the rowset</member>
</simplelist>
<formalpara id="xmlasecurity"><title>Security</title>
<para>The Execute operation needs the properties Username and Password
to be supplied in order to execute the statement on behalf of an SQL
user account. If these are not supplied the request will be rejected with
SOAP:Fault message. To prevent a network sniffer from catching the
password in clear text, it is strongly recommended that sending of these
properties be done via HTTPS (SSL/TLS) connection (for HTTPS setup
see Web server section, and tutorials).</para>
</formalpara>
<formalpara id="xmlastatesupport"><title>State Support</title>
<para>The Virtuoso XMLA provider implements statelessness for the
settable properties. This means that properties such as UserName and
Password can be set in the beginning and they will be restored on server
side on the next request ID for which they are not supplied. This mechanism
is very similar to URL poisoning state support, which is described in the
Web server section of the documentation. In short, the XMLA client asks
to begin a session, the XMLA provider returns a session ID and from
that point the client sends this ID to the server. If the client wishes,
it may cancel the session with an end session request.</para>
</formalpara>
<para>The above requests are SOAP messages carried in the
SOAP Header element. Please note that these headers can be sent together
with Discover or Execute operations.</para>
<para>Here is a a simple session: </para>
<programlisting><![CDATA[
- client requests a session
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP-ENV:Header>
<xmla:BeginSession xmlns:xmla="urn:schemas-microsoft-com:xml-analysis" mustUnderstand="1"/>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<!-- Discover or Execute call -->
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
- server returns the SessionID
<SOAP-ENV:Header>
<xmla:Session xmlns:xmla="urn:schemas-microsoft-com:xml-analysis" mustUnderstand="1" SessionID="NNNNNN" />
</SOAP-ENV:Header>
- sequential requests of client contains:
<SOAP-ENV:Header>
<xmla:Session xmlns:xmla="urn:schemas-microsoft-com:xml-analysis" mustUnderstand="1" SessionID="NNNNNN" />
</SOAP-ENV:Header>
- and finally client cancel the session:
<SOAP-ENV:Header>
<xmla:EndSession xmlns:xmla="urn:schemas-microsoft-com:xml-analysis" mustUnderstand="1" SessionID="NNNNNN" />
</SOAP-ENV:Header>
]]></programlisting>
<title>Namespaces</title>
<para>The request and response are in the "urn:schemas-microsoft-com:xml-analysis"
namespace. Also SOAPAction header field must be "urn:schemas-microsoft-com:xml-analysis:Discover"
and "urn:schemas-microsoft-com:xml-analysis:Execute" for Discover and Execute operations.</para>
<title>Virtuoso extensions</title>
<para>
The following settable properties are available to the execute request: </para>
<para>direction - one of forward, backward</para>
<para>skip - integer</para>
<para>n-rows integer</para>
<para> bookmark-from - string </para>
<para> retrieve-row-count - string </para>
<para> The direction indicates in which direction the cursor moves from the
bookmark-from. If there is no bookmark-from, the query is always forward
from the start of the evaluation. </para>
<para> skip allows skipping a number of rows in the selected direction.
n-rows gives the number of rows to return after the skip. Fewer rows will
be returned if the evaluation does not extend this far. </para>
<para> The bookmark is an opaque string, acceptable values are values that have
been in a bookmark element of a result row. </para>
<para> return-bookmark boolean </para>
<para> If true, a bookmark element is added to each row of the result set. </para>
<para> A simple request / response is added to samples. </para>
<para> The retrieve-row-count element of the query options must be true for rowcount returning to be enabled.</para>
<para>If retrieve-row-count is specified, the response has a row-count element with a text value containing the total result set size of the query, irrespective of the specified window of rows retrieved. Note that for large result sets getting the row count can be prohibitively expensive.</para>
<title>Virtual directory Setup</title>
<para>To make a virtual directory work as an XMLA data provider it is enough
to grant execute permissions on Discover and Execute procedures to the SQL
account specified for SOAP execution in this virtual directory.</para>
<para>For compliance with XMLA, the virtual directory attribute elementFormDefault
must have the value "qualified" in the XMLA SOAP end point.</para>
<para>Here are the steps for setting up a virtual directory
for use with XMLA:</para>
<programlisting><![CDATA[
create user "XMLA";
user_set_qualifier ('XMLA', 'XMLA');
VHOST_REMOVE (lpath=>'/XMLA');
VHOST_DEFINE (lpath=>'/XMLA', ppath=>'/SOAP/', soap_user => 'XMLA',
soap_opts => vector ('ServiceName', 'XMLAnalysis', 'elementFormDefault', 'qualified'));
grant execute on DB.."Discover" to "XMLA";
grant execute on DB.."Execute" to "XMLA";
]]></programlisting>
<example id="ex_virtdir4xmla"><title>Simple Discovery Request/Response examples</title>
<para>The following example shows a simple request for discovering data
sources and response from server.</para>
<programlisting><![CDATA[
<?xml version="1.0"?>
<SOAP:Envelope SOAP:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP:Body>
<cli:Discover xmlns:cli="urn:schemas-microsoft-com:xml-analysis">
<RequestType xsi:type="xsd:string" dt:dt="string">DISCOVER_DATASOURCES</RequestType>
<Restrictions xsi:nil="1"/>
<Properties xsi:nil="1" />
</Properties>
</cli:Discover>
</SOAP:Body>
</SOAP:Envelope>
<SOAP:Envelope SOAP:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<SOAP:Body>
<cli:DiscoverResponse xmlns:cli="urn:schemas-microsoft-com:xml-analysis">
<Result xmlns="">
<root xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<n0:schema xmlns:n0="http://www.w3.org/2001/XMLSchema"
targetNamespace="urn:schemas-microsoft-com:xml-analysis:rowset"
elementFormDefault="qualified">
<n0:element name="root" type="n2:root" xmlns:n2="urn:schemas-microsoft-com:xml-analysis:rowset"/>
<n0:complexType name="root">
<n0:sequence minOccurs="0" maxOccurs="unbounded">
<n0:element name="row" type="n2:row" xmlns:n2="urn:schemas-microsoft-com:xml-analysis:rowset"/>
</n0:sequence>
</n0:complexType>
<n0:complexType name="row">
<n0:choice maxOccurs="unbounded" minOccurs="0">
<n0:element name="DataSourceName" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="DataSourceName" nillable="0"/>
<n0:element name="DataSourceDescription" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="DataSourceDescription" nillable="0"/>
<n0:element name="URL" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="URL" nillable="0"/>
<n0:element name="DataSourceInfo" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="DataSourceInfo" nillable="0"/>
<n0:element name="ProviderName" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="ProviderName" nillable="0"/>
<n0:element name="ProviderType" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="ProviderType">
<n0:complexType>
<n0:sequence minOccurs="0" maxOccurs="unbounded">
<n0:any processContents="lax" maxOccurs="unbounded"/>
</n0:sequence>
</n0:complexType>
</n0:element>
<n0:element name="AuthenticationMode" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="AuthenticationMode" nillable="0"/>
</n0:choice>
</n0:complexType>
</n0:schema>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<DataSourceName>Local Server</DataSourceName>
<DataSourceDescription>Virtuoso Server</DataSourceDescription>
<URL>http://example.com/XMLA</URL>
<DataSourceInfo>DSN=__local</DataSourceInfo>
<ProviderName>Virtuoso XML for Analysis</ProviderName>
<ProviderType>
<TDP xsi:type="xsd:string" dt:dt="string"/>
</ProviderType>
<AuthenticationMode>Unauthenticated</AuthenticationMode>
</row>
</root>
</Result>
</cli:DiscoverResponse>
</SOAP:Body>
</SOAP:Envelope>
]]></programlisting>
<para>The following example shows a query against the Northwind's database's Customers table</para>
<para>Request/Response</para>
<programlisting><![CDATA[
<?xml version="1.0"?>
<SOAP:Envelope SOAP:encodingType="http://schemas.xmlsoap.org/soap/encoding/" SOAP:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:ref="http://schemas.xmlsoap.org/ws/2002/04/reference/" xmlns:dt="urn:schemas-microsoft-com:datatypes">
<SOAP:Body>
<cli:Execute xmlns:cli="urn:schemas-microsoft-com:xml-analysis">
<Command>
<Statement xsi:type="xsd:string" dt:dt="string">select CustomerID , CompanyName from Demo..Customers where CustomerID like 'A%'</Statement>
</Command>
<Restrictions xsi:nil="1"/>
<Properties>
<PropertyList>
<DataSourceInfo xsi:type="xsd:string" dt:dt="string">DSN=__local</DataSourceInfo>
<Password type="http://www.w3.org/2001/XMLSchema:string" dt="string" >demo</Password>
<UserName type="http://www.w3.org/2001/XMLSchema:string" dt="string" >demo</UserName>
</PropertyList>
</Properties>
</cli:Execute>
</SOAP:Body>
</SOAP:Envelope>
<SOAP:Envelope SOAP:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" xmlns:SOAP="http://schemas.xmlsoap.org/soap/envelope/" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:dt="urn:schemas-microsoft-com:datatypes" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xenc="http://www.w3.org/2001/04/xmlenc#" xmlns:wsse="http://schemas.xmlsoap.org/ws/2002/07/secext" xmlns:ref="http://schemas.xmlsoap.org/ws/2002/04/reference/" xmlns:wsdl="services.wsdl">
<SOAP:Body>
<cli:ExecuteResponse xmlns:cli="urn:schemas-microsoft-com:xml-analysis">
<Result xmlns="">
<root xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<n0:schema xmlns:n0="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:schemas-microsoft-com:xml-analysis:rowset" elementFormDefault="qualified">
<n0:element name="root" type="n2:root" xmlns:n2="urn:schemas-microsoft-com:xml-analysis:rowset"/>
<n0:complexType name="root">
<n0:sequence minOccurs="0" maxOccurs="unbounded">
<n0:element name="row" type="n2:row" xmlns:n2="urn:schemas-microsoft-com:xml-analysis:rowset"/>
</n0:sequence>
</n0:complexType>
<n0:complexType name="row">
<n0:choice maxOccurs="unbounded" minOccurs="0">
<n0:element name="CustomerID" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="CustomerID" nillable="0"/>
<n0:element name="CompanyName" type="string" xmlns:n2="urn:schemas-microsoft-com:xml-sql" n2:field="CompanyName" nillable="1"/>
</n0:choice>
</n0:complexType>
</n0:schema>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<CustomerID>ALFKI</CustomerID>
<CompanyName>Alfreds Futterkiste</CompanyName>
</row>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<CustomerID>ANATR</CustomerID>
<CompanyName>Ana Trujillo Emparedados y helados</CompanyName>
</row>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<CustomerID>ANTON</CustomerID>
<CompanyName>Antonio Moreno Taquería</CompanyName>
</row>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<CustomerID>AROUT</CustomerID>
<CompanyName>Around the Horn</CompanyName>
</row>
</root>
</Result>
</cli:ExecuteResponse>
</SOAP:Body>
</SOAP:Envelope>
]]></programlisting>
<para>The following example shows a simple request for "Execute" operation
whit Virtuoso extension. Sources and response from server.</para>
<programlisting><![CDATA[
<Envelope xmlns="http://schemas.xmlsoap.org/soap/envelope/" xmlns:n1="http://schemas.xmlsoap.org/soap/envelope/" xmlns:n2="http://schemas.xmlsoap.org/soap/envelope/" n1:encodingType="http://schemas.xmlsoap.org/soap/encoding/" n2:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<Body xmlns="http://schemas.xmlsoap.org/soap/envelope/">
<Execute xmlns="urn:schemas-microsoft-com:xml-analysis">
<Command>
<Statement xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:string" n2:dt="string">select CustomerID, CompanyName from Demo..Customers</Statement>
</Command>
<Properties>
<PropertyList>
<DataSourceInfo xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:string" n2:dt="string">Local_Instance</DataSourceInfo>
<UserName xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:string" n2:dt="string">dba</UserName>
<Password xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:string" n2:dt="string">dba</Password>
<direction xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:string" n2:dt="string">backward</direction>
<skip xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:int" n2:dt="int">1</skip>
<n-rows xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:int" n2:dt="int">3</n-rows>
<return-bookmark xmlns:n1="http://www.w3.org/2001/XMLSchema-instance" xmlns:n2="urn:schemas-microsoft-com:datatypes" n1:type="http://www.w3.org/2001/XMLSchema:int" n2:dt="int">1</return-bookmark>
</PropertyList>
</Properties>
</Execute>
</Body>
</Envelope>
<Envelope xmlns="http://schemas.xmlsoap.org/soap/envelope/" xmlns:n1="http://schemas.xmlsoap.org/soap/envelope/" n1:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
<Body xmlns="http://schemas.xmlsoap.org/soap/envelope/">
<ExecuteResponse xmlns="urn:schemas-microsoft-com:xml-analysis">
<return xmlns="urn:schemas-microsoft-com:xml-analysis">
<root xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<schema xmlns="http://www.w3.org/2001/XMLSchema" targetNamespace="urn:schemas-microsoft-com:xml-analysis:rowset" elementFormDefault="qualified">
<element xmlns="http://www.w3.org/2001/XMLSchema" name="root" type="urn:schemas-microsoft-com:xml-analysis:rowset:root"/>
<complexType xmlns="http://www.w3.org/2001/XMLSchema" name="root">
<sequence xmlns="http://www.w3.org/2001/XMLSchema" minOccurs="0" maxOccurs="unbounded">
<element xmlns="http://www.w3.org/2001/XMLSchema" name="row" type="urn:schemas-microsoft-com:xml-analysis:rowset:row"/>
</sequence>
</complexType>
<complexType xmlns="http://www.w3.org/2001/XMLSchema" name="row">
<choice xmlns="http://www.w3.org/2001/XMLSchema" maxOccurs="unbounded" minOccurs="0">
<element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:n3="urn:schemas-microsoft-com:xml-sql" name="BOOKMARK" type="string" n3:field="BOOKMARK" nillable="1"/>
<element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:n3="urn:schemas-microsoft-com:xml-sql" name="CustomerID" type="string" n3:field="CustomerID" nillable="0"/>
<element xmlns="http://www.w3.org/2001/XMLSchema" xmlns:n3="urn:schemas-microsoft-com:xml-sql" name="CompanyName" type="string" n3:field="CompanyName" nillable="1"/>
</choice>
</complexType>
</schema>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<BOOKMARK xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">wbwCtQExvAI=</BOOKMARK>
<CustomerID xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">AROUT</CustomerID>
<CompanyName xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">Around the Horn</CompanyName>
</row>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<BOOKMARK xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">wbwCtQExvAE=</BOOKMARK>
<CustomerID xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">ANTON</CustomerID>
<CompanyName xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">Antonio Moreno Taquera</CompanyName>
</row>
<row xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">
<BOOKMARK xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">wbwCtQExvAA=</BOOKMARK>
<CustomerID xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">ANATR</CustomerID>
<CompanyName xmlns="urn:schemas-microsoft-com:xml-analysis:rowset">Ana Trujillo Emparedados y helados</CompanyName>
</row>
</root>
</return>
</ExecuteResponse>
</Body>
</Envelope>
]]></programlisting>
</example>
</sect1>
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