XSLT转换中的一条令人讨厌的空白行 [英] One pesky blank line in an XSLT transform
问题描述
我正在使用XSLT从专利商标局的商标XML文件中提取一些数据.基本上没关系，除了一个空白行.我可以通过适当的丑陋解决方法来摆脱它，但我想知道是否有更好的方法.
I'm using XSLT to extract some data from a trademark XML file from the Patent and Trademark Office. It's mostly okay, except for one blank line. I can get rid of it with a moderately ugly workaround, but I'd like to know if there a better way.
这是我的XSLT的子集:
Here's a subset of my XSLT:
<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:tm="http://www.wipo.int/standards/XMLSchema/trademarks" xmlns:pto="urn:us:gov:doc:uspto:trademark:status">
<xsl:output method="text" encoding="utf-8" />
<xsl:strip-space elements="*"/>
<xsl:template match="tm:Transaction">
<xsl:apply-templates select=".//tm:TradeMark"/>
<xsl:apply-templates select=".//tm:ApplicantDetails"/>
<xsl:apply-templates select=".//tm:MarkEvent"/>
</xsl:template>
<xsl:template match="tm:TradeMark">
MarkCurrentStatusDate,"<xsl:value-of select="normalize-space(tm:MarkCurrentStatusDate)"/>"<xsl:text/>
ApplicationNumber,"<xsl:value-of select="normalize-space(tm:ApplicationNumber)"/>"<xsl:text/>
ApplicationDate,"<xsl:value-of select="normalize-space(tm:ApplicationDate)"/>"<xsl:text/>
RegistrationNumber,"<xsl:value-of select="normalize-space(tm:RegistrationNumber)"/>"<xsl:text/>
RegistrationDate,"<xsl:value-of select="normalize-space(tm:RegistrationDate)"/>"<xsl:text/>
<xsl:apply-templates select="tm:WordMarkSpecification"/>
<xsl:apply-templates select="tm:TradeMarkExt"/>
<xsl:apply-templates select="tm:PublicationDetails"/>
<xsl:apply-templates select="tm:RepresentativeDetails"/>
</xsl:template>
<xsl:template match="tm:WordMarkSpecification">
MarkVerbalElementText,"<xsl:value-of select="normalize-space(tm:MarkVerbalElementText)"/>"<xsl:text/>
</xsl:template>
它还有更多模板，但这就是要点.在任何数据之前，我总是在输出的最开始出现空白行.我没有其他空行.我的规避是将这两行结合起来:
It has a few more templates, but that's the gist of it. I always get a blank line at the very beginning of the output, before any data; I don't get any other blank lines. My circumvention is to combine the two lines:
<xsl:template match="tm:TradeMark">
MarkCurrentStatusDate,"<xsl:value-of select="normalize-space(tm:MarkCurrentStatusDate)"/>"<xsl:text/>
一行:
<xsl:template match="tm:TradeMark">MarkCurrentStatusDate,"<xsl:value-of select="normalize-space(tm:MarkCurrentStatusDate)"/>"<xsl:text/>
这行得通，如果没有更好的方法，我想我可以接受，但对我来说似乎很古怪，就像在l.其他模板都不需要这种处理(例如tm:WordMarkSpecification模板或之后的其他六个模板)，我很困惑为什么在这里需要它.有什么想法吗?
This works, and I guess I'm okay with it if there's nothing better, but it seems inelegant and like a kludge to me. None of the other templates need this treatment (e.g. the tm:WordMarkSpecification template or another six after that)), and I'm confused why it's needed here. Any ideas?
因为我可以看到XSLT中插入空白行的特定点，所以我认为提供正在测试的XML并没有帮助，但是如果需要查看它，可以在 https://tsdrapi.uspto.gov/ts/cd/casestatus/rn2178784/download .zip ;这是该存档中的XML文件.
Because I can see the specific point in the XSLT that's inserting the blank line, I presume it's not helpful to provide the XML I'm testing on, but if you do need to see it, you can get it at https://tsdrapi.uspto.gov/ts/cd/casestatus/rn2178784/download.zip ; it's the XML file in that archive.
推荐答案
在模板开头使用与在模板结尾处使用的技巧相同的技巧，以空的<xsl:text/>指令切碎样式表节点树:
Use at the beginning of the template the same trick you are using at the end of the template to chop up the stylesheet node tree with empty <xsl:text/> instructions:
<xsl:template match="tm:TradeMark">
<xsl:text/>MarkCurrentStatusDate,"<xsl:value-of select="normalize-space(tm:MarkCurrentStatusDate)"/>"<xsl:text/>
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