我正在尝试将动态模式下的自动完成组件添加到使用Orbeon Form Builder（版本为Orbeon Forms 3.9.0 + .stable.201109261742 PE）创建的表单。
下面的xml是一个简单的测试表单，其中包含自动完成功能，可从公共Web服务（当前具有静态请求主体）检索数据。 第一次自动完成加载数据时，它工作正常：项目显示在列表中。但第二次，当我输入另一个字符来缩小搜索结果范围时，或者当我从列表中选择一个项目时，我收到错误消息“prolog中不允许内容”。
如果我忽略错误并继续，则错误将更改为“获得意外的请求序列号”。
我不明白为什么它只能在第一次工作，因为Web服务返回的数据总是因为静态请求体而相同。
下面是测试表格的完整xml。
<xhtml:html xmlns:xhtml="http://www.w3.org/1999/xhtml"
xmlns:xxi="http://orbeon.org/oxf/xml/xinclude"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:ev="http://www.w3.org/2001/xml-events"
xmlns:xforms="http://www.w3.org/2002/xforms"
xmlns:saxon="http://saxon.sf.net/"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:exforms="http://www.exforms.org/exf/1-0"
xmlns:sql="http://orbeon.org/oxf/xml/sql"
xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xxforms="http://orbeon.org/oxf/xml/xforms"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xhtml:head>
<xhtml:title>Test form</xhtml:title>
<xforms:model id="fr-form-model">
<xforms:instance id="fr-form-instance">
<form>
<section-1>
<codeSearch/>
</section-1>
</form>
</xforms:instance>
<xforms:bind id="fr-form-binds" nodeset="instance('fr-form-instance')">
<xforms:bind id="section-1-bind" nodeset="section-1">
<xforms:bind id="codeSearch-bind" nodeset="codeSearch" name="codeSearch" type="xforms:string"/>
</xforms:bind>
</xforms:bind>
<xforms:instance id="fr-form-metadata" xxforms:readonly="true">
<metadata>
<application-name>IRISbox</application-name>
<form-name>Test</form-name>
<title xml:lang="fr">Test form</title>
<description xml:lang="fr"/>
<author/>
<logo mediatype="" filename="" size=""/>
</metadata>
</xforms:instance>
<xforms:instance id="fr-form-attachments">
<attachments>
<css mediatype="text/css" filename="" size=""/>
<pdf mediatype="application/pdf" filename="" size=""/>
</attachments>
</xforms:instance>
<xforms:instance id="fr-form-resources" xxforms:readonly="false">
<resources>
<resource xml:lang="fr">
<codeSearch>
<label>Cities</label>
<hint/>
<help/>
<alert/>
</codeSearch>
<section-1>
<label>Test</label>
<help/>
</section-1>
</resource>
</resources>
</xforms:instance>
<xforms:instance id="fr-service-request-instance" xxforms:exclude-result-prefixes="#all">
<request/>
</xforms:instance>
<xforms:instance id="fr-service-response-instance" xxforms:exclude-result-prefixes="#all">
<response/>
</xforms:instance>
<!-- Search Cities by Name HTTP service -->
<xforms:instance id="searchCitiesByName-instance" class="fr-service"
xxforms:exclude-result-prefixes="#all">
<body><soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns="http://www.restfulwebservices.net/ServiceContracts/2008/01">
<soapenv:Header/>
<soapenv:Body>
<ns:GetCitiesByCountry>
<ns:Country>USA</ns:Country>
</ns:GetCitiesByCountry>
</soapenv:Body>
</soapenv:Envelope></body>
</xforms:instance>
<xforms:submission id="searchCitiesByName-submission" class="fr-service"
ref="instance('fr-service-request-instance')"
resource="http://www.restfulwebservices.net/wcf/WeatherForecastService.svc"
method="post"
serialization="application/xml"
mediatype="application/soap+xml; action=GetCitiesByCountry"
replace="instance"
instance="searchCitiesByName-instance"/>
<xforms:action ev:event="xforms-submit" ev:observer="searchCitiesByName-submission">
<xxforms:variable name="request-instance-name" select="'searchCitiesByName-instance'"
as="xs:string"/>
<xforms:insert nodeset="instance('fr-service-request-instance')"
origin="saxon:parse(instance($request-instance-name))"/>
</xforms:action>
</xforms:model>
</xhtml:head>
<xhtml:body>
<fr:view>
<xforms:label ref="instance('fr-form-metadata')/title"/>
<fr:body>
<fr:section id="section-1-section" bind="section-1-bind">
<xforms:label ref="$form-resources/section-1/label"/>
<xforms:help ref="$form-resources/section-1/help"/>
<fr:grid columns="1">
<xhtml:tr>
<xhtml:td>
<fr:autocomplete
id="codeSearch"
bind="codeSearch-bind"
dynamic-itemset="true"
max-results-displayed="50">
<xforms:label ref="$form-resources/codeSearch/label"/>
<!-- React to user searching -->
<xforms:action ev:event="fr-search-changed">
<xxforms:variable name="search-value" select="event('fr-search-value')"/>
<xxforms:variable name="make-suggestion" select="string-length($search-value) >= 2"/>
<xforms:action if="$make-suggestion">
<xforms:setvalue ref="instance('code-search-instance')/searchFor" value="$search-value"/>
<xforms:send submission="searchCitiesByName-submission"/>
</xforms:action>
<xforms:action if="not($make-suggestion)">
<!-- Delete itemset -->
<xforms:delete nodeset="instance('searchCitiesByName-instance')//*:GetCitiesByCountryResult/*:string"/>
</xforms:action>
</xforms:action>
<xforms:itemset nodeset="instance('searchCitiesByName-instance')//*:GetCitiesByCountryResult/*:string">
<xforms:label ref="text()"/>
<xforms:value ref="text()"/>
</xforms:itemset>
</fr:autocomplete>
</xhtml:td>
</xhtml:tr>
<xhtml:tr>
<xhtml:td>
<widget:xforms-instance-inspector xmlns:widget="http://orbeon.org/oxf/xml/widget" id="orbeon-xforms-inspector"/>
</xhtml:td>
</xhtml:tr>
</fr:grid>
</fr:section>
</fr:body>
</fr:view>
</xhtml:body>
</xhtml:html>
感谢任何帮助。