XForms 重复：相同的元素名称，不同的值约束

Question

我正在尝试在 XForms（eXist-db 中的 XSLTForms 实现）中编辑 RDF/XML，我需要对 xf:repeat 结构中具有相同名称的元素强制执行不同的值约束。例如，我有一个 bf:subject 元素，它可以将默认 URI 作为其 @rdf:resource 属性的值，也可以将任意 URI 链接到表单中定义的其他资源（为简洁起见）我在下面提供的示例中省略了这些）。

在xf:repeat结构中，如何区分同名元素？我可以使用将 @rdf:resource 的值限制为 xf:model 中指定的默认 URI 的谓词来处理第一种情况，但我找不到一种方法来实现对 [= =13=] 可以采用任意 URI。

注意：第二个嵌套 xf:repeat 中没有表单控件，因为 @rdf:resource 的值是使用单独的 JavaScript 库动态更新的（jsPlumb) 更新 XForms 实例。

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="http://localhost:8080/exist/apps/xsltforms/xsltforms.xsl" type="text/xsl"?>
<?xsltforms-options debug="yes"?>
<?css-conversion no?>
<?xml-model href="http://www.oxygenxml.com/1999/xhtml/xhtml-xforms.nvdl" schematypens="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:bf="http://bibframe.org/vocab/"
    xmlns:ev="http://www.w3.org/2001/xml-events"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:xf="http://www.w3.org/2002/xforms"
    xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <title>Editor</title>
        <!--Model-->
        <xf:model id="rdf-model">
            <xf:instance id="graph">
                <rdf:RDF>
                    <bf:Work rdf:about="">
                        <bf:subject rdf:resource="http://id.loc.gov/vocabulary/geographicAreas/s-ag"></bf:subject>
                        <bf:subject rdf:resource=""/>
                    </bf:Work>
                </rdf:RDF>
            </xf:instance>
            <!-- Template -->
            <xf:instance id="bf-Work-template">
                <rdf:RDF>
                    <bf:Work rdf:about="">
                        <bf:subject rdf:resource="http://id.loc.gov/vocabulary/geographicAreas/s-ag"></bf:subject>
                        <bf:subject rdf:resource=""/>
                    </bf:Work>
                </rdf:RDF>
            </xf:instance>
        </xf:model>
    </head>
    <body>
        <div id="header">
            <h1>Editor</h1>
        </div>
        <div id="forms">
            <!-- Repeat for Work entity -->
            <xf:repeat nodeset="instance('graph')/bf:Work" id="repeat-Work-graph">

                <!-- Repeat bf:subject elements that have a default value. -->
                <xf:repeat
                    nodeset="bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]">
                    <div style="border:solid black 1px;">
                        <xf:input
                            ref="@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']">
                            <xf:label>Subject</xf:label>
                        </xf:input>

                        <!-- Add new bf:subject elements that have a default value -->
                        <xf:trigger ref=".">
                            <xf:label>+</xf:label>
                            <xf:action ev:event="DOMActivate">
                                <xf:insert
                                    nodeset="../bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]"
                                    origin="instance('bf-Work-template')/bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]"
                                    at="last()" position="after"></xf:insert>
                            </xf:action>
                        </xf:trigger>

                        <!-- Delete bf:subject elements that have a default value -->
                        <xf:trigger
                            ref=".[count(../bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]) &gt; 1]">
                            <xf:label>-</xf:label>
                            <xf:delete ev:event="DOMActivate" nodeset="." at="last()"
                                if="count(../bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]) &gt; 1"
                            ></xf:delete>
                        </xf:trigger>
                    </div>
                </xf:repeat>

                <!-- Add new bf:subject elements that can take an arbitrary value -->
                <xf:trigger ref="bf:subject[@rdf:resource = '']">
                    <xf:label>+</xf:label>
                    <xf:action ev:event="DOMActivate">
                        <xf:insert nodeset="."
                            origin="instance('bf-Work-template')/bf:Work/bf:subject[@rdf:resource = '']"
                            at="last()" position="after"></xf:insert>
                    </xf:action>
                </xf:trigger>

                <!-- Delete bf:subject elements that can take an arbitrary value -->
                <xf:trigger
                    ref="bf:subject[@rdf:resource = ''][count(../bf:subject[@rdf:resource = '']) &gt; 1]">
                    <xf:label>-</xf:label>
                    <xf:action ev:event="DOMActivate">
                        <xf:delete nodeset="../bf:subject[@rdf:resource = '']" at="last()"
                            if="count(../bf:subject[@rdf:resource = '']) &gt; 1"></xf:delete>
                    </xf:action>
                </xf:trigger>

                <!-- Repeat bf:subject elements that can take an arbitrary value -->
                <xf:repeat nodeset="bf:subject[@rdf:resource = '']">
                    <div style="border:solid black 1px;">
                    <!-- Value of @rdf:resource is updated using jsPlumb library -->
                        <span class="label">Subject</span>
                        <br />
                        <span>Link to:</span>
                        <br />
                        <span class="connect-to">Work</span>
                        <br />
                        <span class="connect-to">Topic</span>
                        <br />
                        <span class="connect-to">Place</span>
                    </div>
                </xf:repeat>

            </xf:repeat>
        </div>
    </body>
</html>

Answer 1

目前，默认的 URI 都来自同一个命名空间 (http://id.loc.gov/vocabulary/...)，因此临时解决方案只是过滤该值：not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))。从长远来看，我正在研究 nomisma.org，它体现了一种更可持续的 XForms 链接数据词汇管理方法。

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet href="http://localhost:8080/exist/apps/xsltforms/xsltforms.xsl" type="text/xsl"?>
<?xsltforms-options debug="yes"?>
<?css-conversion no?>
<?xml-model href="http://www.oxygenxml.com/1999/xhtml/xhtml-xforms.nvdl" schematypens="http://purl.oclc.org/dsdl/nvdl/ns/structure/1.0"?>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:bf="http://bibframe.org/vocab/"
    xmlns:ev="http://www.w3.org/2001/xml-events"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:xf="http://www.w3.org/2002/xforms"
    xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <title>Editor</title>
        <!--Model-->
        <xf:model id="rdf-model">
            <xf:instance id="graph">
                <rdf:RDF>
                    <bf:Work rdf:about="">
                        <bf:subject rdf:resource="http://id.loc.gov/vocabulary/geographicAreas/s-ag"></bf:subject>
                        <bf:subject rdf:resource="http://id.loc.gov/vocabulary/geographicAreas/s-bl"></bf:subject>
                        <bf:subject rdf:resource=""/>
                    </bf:Work>
                </rdf:RDF>
            </xf:instance>
            <!-- Template -->
            <xf:instance id="bf-Work-template">
                <rdf:RDF>
                    <bf:Work rdf:about="">
                        <bf:subject rdf:resource="http://id.loc.gov/vocabulary/geographicAreas/s-ag"></bf:subject>
                        <bf:subject rdf:resource="http://id.loc.gov/vocabulary/geographicAreas/s-bl"></bf:subject>
                        <bf:subject rdf:resource=""/>
                    </bf:Work>
                </rdf:RDF>
            </xf:instance>
        </xf:model>
    </head>
    <body>
        <div id="header">
            <h1>Editor</h1>
        </div>
        <div id="forms">
            <!-- Repeat for Work entity -->
            <xf:repeat nodeset="instance('graph')/bf:Work" id="repeat-Work-graph">

                <!-- Repeat bf:subject elements that have a default value. -->
                <xf:repeat
                    nodeset="bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]">
                    <div style="border:solid black 1px;">
                        <xf:input
                            ref="@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']">
                            <xf:label>Subject</xf:label>
                        </xf:input>

                        <!-- Add new bf:subject elements that have a default value -->
                        <xf:trigger ref=".">
                            <xf:label>+</xf:label>
                            <xf:action ev:event="DOMActivate">
                                <xf:insert
                                    nodeset="../bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]"
                                    origin="instance('bf-Work-template')/bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]"
                                    at="last()" position="after"></xf:insert>
                            </xf:action>
                        </xf:trigger>

                        <!-- Delete bf:subject elements that have a default value -->
                        <xf:trigger
                            ref=".[count(../bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]) &gt; 1]">
                            <xf:label>-</xf:label>
                            <xf:delete ev:event="DOMActivate" nodeset="." at="last()"
                                if="count(../bf:subject[@rdf:resource[. = 'http://id.loc.gov/vocabulary/geographicAreas/s-ag']]) &gt; 1"
                                ></xf:delete>
                        </xf:trigger>
                    </div>
                </xf:repeat>

                <!-- Add new bf:subject elements that can take an arbitrary value -->
                <xf:trigger ref="bf:subject[not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))]">
                    <xf:label>+</xf:label>
                    <xf:action ev:event="DOMActivate">
                        <xf:insert nodeset="."
                            origin="instance('bf-Work-template')/bf:Work/bf:subject[not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))]"
                            at="last()" position="after"></xf:insert>
                    </xf:action>
                </xf:trigger>

                <!-- Delete bf:subject elements that can take an arbitrary value -->
                <xf:trigger
                    ref="bf:subject[not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))][count(../bf:subject[not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))]) &gt; 1]">
                    <xf:label>-</xf:label>
                    <xf:action ev:event="DOMActivate">
                        <xf:delete nodeset="../bf:subject[not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))]" at="last()"
                            if="count(../bf:subject[not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))]) &gt; 1"></xf:delete>
                    </xf:action>
                </xf:trigger>

                <!-- Repeat bf:subject elements that can take an arbitrary value -->
                <xf:repeat nodeset="bf:subject[not(starts-with(@rdf:resource, 'http://id.loc.gov/vocabulary/geographicAreas/'))]">
                    <div style="border:solid black 1px;">
                        <!-- Value of @rdf:resource is updated using jsPlumb library -->
                        <span class="label">Subject</span>
                        <br />
                        <span>Link to:</span>
                        <br />
                        <span class="connect-to">Work</span>
                        <br />
                        <span class="connect-to">Topic</span>
                        <br />
                        <span class="connect-to">Place</span>
                    </div>
                </xf:repeat>

            </xf:repeat>
        </div>
    </body>
</html>

Answer 2

如果您正在寻找一种 XPath 方法来了解某个元素是第一个还是第二个子元素，您可以考虑使用坐标轴，例如 .[preceding-sibling::bf:subject]

XForms 重复：相同的元素名称，不同的值约束

XForms repeat: same element name, different value constraints

xml

xpath

rdf

xforms

xsltforms