我刚刚开始使用XSLT，所以请耐心等待。我正在处理一个相当复杂的文档，其结构类似于下面的结构。它分为两个部分，<script>
function set_st(e) {
var val = e.options[e.selectedIndex].value;
console.log(val);
}
</script>
<table>
<tbody>
<tr>
<td>
<div>United States: <span data-tooltip='Choose a US state'><select name='usst' id='usst' size='1' onchange='set_st(this)' >
<option value=''></option><option value='al'>Alabama</option><option value='ak'>Alaska</option><option value='az'>Arizona</option><option value='ar'>Arkansas</option><option value='ca'>California</option><option value='co'>Colorado</option><option value='ct'>Connecticut</option><option value='de'>Delaware</option><option value='dc'>District of Columbia</option><option value='fl'>Florida</option><option value='ga'>Georgia</option><option value='hi'>Hawaii</option><option value='id'>Idaho</option><option value='il'>Illinois</option><option value='in'>Indiana</option><option value='ia'>Iowa</option><option value='ks'>Kansas</option><option value='ky'>Kentucky</option><option value='la'>Louisiana</option><option value='me'>Maine</option><option value='md'>Maryland</option><option value='ma'>Massachusetts</option><option value='mi'>Michigan</option><option value='mn'>Minnesota</option><option value='ms'>Mississippi</option><option value='mo'>Missouri</option><option value='mt'>Montana</option><option value='ne'>Nebraska</option><option value='nv'>Nevada</option><option value='nh'>New Hampshire</option><option value='nj'>New Jersey</option><option value='nm'>New Mexico</option><option value='ny'>New York</option><option value='nc'>North Carolina</option><option value='nd'>North Dakota</option><option value='oh'>Ohio</option><option value='ok'>Oklahoma</option><option value='or'>Oregon</option><option value='pa'>Pennsylvania</option><option value='ri'>Rhode Island</option><option value='sc'>South Carolina</option><option value='sd'>South Dakota</option><option value='tn'>Tennessee</option><option value='tx'>Texas</option><option value='ut'>Utah</option><option value='vt'>Vermont</option><option value='va'>Virginia</option><option value='wa'>Washington</option><option value='wv'>West Virginia</option><option value='wi'>Wisconsin</option><option value='wy'>Wyoming</option><option value='pr'>Puerto Rico</option></select>
</span><span data-tooltip='Choose a US water resource region'><select name='ushuc' id='ushuc' size='1' onchange='set_st(this);' >
<option value=''>Water Res. Region</option><option value='01'>01 New England</option><option value='02'>02 Mid Atlantic</option><option value='03'>03 South Atlantic-Gulf</option><option value='04'>04 Great Lakes</option><option value='05'>05 Ohio</option><option value='06'>06 Tennessee</option><option value='07'>07 Upper Mississippi</option><option value='08'>08 Lower Mississippi</option><option value='09'>09 Souris-Red-Rainy</option><option value='10'>10 Missouri</option><option value='11'>11 Arkansas-White-Red</option><option value='12'>12 Texas-Gulf</option><option value='13'>13 Rio Grande</option><option value='14'>14 Upper Colorado</option><option value='15'>15 Lower Colorado</option><option value='16'>16 Great Basin</option><option value='17'>17 Pacific Northwest</option><option value='18'>18 California</option><option value='19'>19 Alaska</option><option value='20'>20 Hawaii</option><option value='21'>21 Puerto Rico</option></select>
</span>
</div>
</td>
</tr>
<tr>
<td>
<div>Canada:<span data-tooltip='Choose a Canadian province'><select name='nus' id='nus' size='1' onchange='set_st(this);' >
<option value=''></option><option value='zab'>Alberta</option><option value='zbc'>British Columbia</option><option value='zmb'>Manitoba</option><option value='znb'>New Brunswick</option><option value='znl'>Newfoundland and Labrador</option><option value='zns'>Nova Scotia</option><option value='znt'>Northwest Territories</option><option value='znu'>Nunavut</option><option value='zon'>Ontario</option><option value='zpe'>Prince Edward Island</option><option value='zqc'>Quebec</option><option value='zsk'>Saskatchewan</option><option value='zyt'>Yukon</option></select>
</span><span data-tooltip='Choose a Canadian river basin'><select name='nhuc' id='nhuc' size='1' onchange='set_st(this);' >
<option value=''>Canadian River Basins</option><option value='z01'>01 Maritime Provinces Drainage</option><option value='z02'>02 St.Lawrence River Drainage</option><option value='z03'>03 Northern Quebec Drainage</option><option value='z04'>04 Southwest Hudson Bay Drainage</option><option value='z05'>05 Nelson River Drainage</option><option value='z06'>06 Western Hudson Bay Drainage</option><option value='z07'>07 Great Slave Lake Drainage</option><option value='z08'>08 Pacific Drainage</option><option value='z09'>09 Yukon River Drainage</option><option value='z10'>10 Arctic Drainage</option><option value='z11'>11 Mississippi River Drainage</option></select>
</span>
</div>
<div style='margin-left: 10px; float: right;' data-tooltip="Click to view a map of specified region.">
<input name="go" value="Go" type="submit" />
</div>
</td>
</tr>
</tbody>
</table>
<iframe src="http://watermonitor.gov/naww/index.php" id="my-iframe">和data。对于每个meta我需要查找＆＃34;实际＆＃34;相应的data/item中的类。
meta/item我需要在{class 1}}中对其class属性中的相邻<root>
<data>
<item id="i1">
<h3 id="p2">akkakk</h3>
<p id="p3">osijaoid</p>
<p id="p4">jqidqjwd</p>
<item>
</data>
<meta>
<item ref="i1">
<p ref="p2" class="heading"/>
<p ref="p3" class="heading"/>
<p ref="p4" class="body"/>
</item>
</meta>
</root>
元素进行分组。我认为辅助功能可以使它更清洁：
p然后在处理数据节点时使用它，就像这样。我的问题是我无法从函数返回的节点集中进一步选择。
meta我可以编写一个明星，就像<xsl:function name="fn:node-groups" as="node()*">
<xsl:param name="parent"/>
<xsl:variable name="nodeRefs" select="root($parent)//meta/item[@ref = $parent/@id]/p"/>
<xsl:for-each-group select="$nodeRefs" group-adjacent="@class">
<group class="{@class}">
<xsl:for-each select="current-group()">
<node ref="{@ref}"/>
</xsl:for-each>
</group>
</xsl:for-each-group>
</xsl:function>
一样，这给了我所有<xsl:template match="//data/item">
<!-- works -->
<xsl:variable name="test1" select="fn:node-groups(.)"/>
<!-- works -->
<xsl:variable name="test2" select="fn:node-groups(.)/*"/>
<!-- does not work -->
<xsl:variable name="test3" select="fn:node-groups(.)/group[@class = 'heading']"/>
</xsl:template>
个节点。但其他任何东西只给我一个空的节点集。或者至少它看起来那样，但此时我真的不知道了。
答案 0 :(得分：1)
我认为你的样式表有一个xmlns="http://example.com/foo"命名空间声明范围，用于将结果元素放在该命名空间中的函数中，然后fn:node-groups(.)/group显然不会选择它们group没有命名空间的元素。因此，请确保您的函数使用<xsl:for-each-group select="$nodeRefs" group-adjacent="@class" xmlns="">覆盖该命名空间。
另一个原因可能是您的样式表定义了xpath-default-namespace。
我还认为你的第三个变量需要是<xsl:variable name="test3" select="mf:node-groups(.)/node"/>，因为你的函数返回的节点序列显然已经是group个元素的序列，如果你想过滤那个序列然后使用{{ 1}}