我想從MediaInfo的XML生成的duration標記中輸出一致的hh：mm：ss標記。但我不確定如何創建一個xsl：模板，它將按照我想要的方式來設置持續時間的格式。的MediaInfo輸出爲我的音頻文件的持續時間在兩個方面，例如：使用MediaInfo XML輸出中的xslt創建hhmmss模板
<MediaInfoDuration>1h 58mn</MediaInfoDuration>
我想它翻譯成
<Duration>01:58:00</Duration>
和
<MediaInfoDuration>56mn 48s</MediaInfoDuration>
我」 d想翻譯成
<Duration>00:56:48</Duration>
我真正知道如何做的唯一的事情就是使用子字符串，但由於「mn」可以出現在不同的位置，而「s」有時根本不會，所以我不知道該怎麼做。我想我需要僱員變量，也許xsl：選擇，但我不確定。
這是一種方法。舉例來說，假設包含'h'的元素永遠不會包含's'。
這XSLT樣式表：
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" indent="yes" omit-xml-declaration="yes"/>
<!-- The identity transform. -->
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates />
</xsl:copy>
</xsl:template>
<!-- Match MediaInfoDuration elements containing 'h'. -->
<xsl:template match="MediaInfoDuration[contains(., 'h')]">
<Duration>
<xsl:call-template name="hh-mm-ss">
<xsl:with-param name="hours" select="substring-before(., 'h')" />
<xsl:with-param name="minutes" select="substring-before(substring-after(., 'h '), 'mn')"/>
</xsl:call-template>
</Duration>
</xsl:template>
<!-- Match the other kind of MediaInfoDuration element. -->
<xsl:template match="MediaInfoDuration">
<Duration>
<xsl:call-template name="hh-mm-ss">
<xsl:with-param name="minutes" select="substring-before(., 'mn')" />
<xsl:with-param name="seconds" select="substring-before(substring-after(., 'mn '), 's')"/>
</xsl:call-template>
</Duration>
</xsl:template>
<!-- Formatting the output. -->
<xsl:template name="hh-mm-ss">
<xsl:param name="hours" select=" '0' "/>
<xsl:param name="minutes" select=" '0' " />
<xsl:param name="seconds" select=" '0' "/>
<xsl:value-of select="format-number($hours, '00')"/>
<xsl:text>:</xsl:text>
<xsl:value-of select="format-number($minutes, '00')"/>
<xsl:text>:</xsl:text>
<xsl:value-of select="format-number($seconds, '00')"/>
</xsl:template>
</xsl:stylesheet>
時，該輸入用於XML：
<root>
<MediaInfoDuration>56mn 48s</MediaInfoDuration>
<MediaInfoDuration>1h 58mn</MediaInfoDuration>
</root>
產生這樣的輸出：
<root>
<Duration>00:56:48</Duration>
<Duration>01:58:00</Duration>
</root>
這個效果很好，雖然我不知道如何使其適合我現有的XSL。我想我簡化了它，現在我不確定在哪裏粘貼它。這是我正在改變的文件。
<File>
<track type="General">
<Complete_name>F:\NYAC\WNYC-NYAC-2002-06-06-24719-B.wav</Complete_name>
<Format>Wave</Format>
<File_size>573 MiB</File_size>
<MediaInfoDuration>56mn 48s</MediaInfoDuration>
<Overall_bit_rate_mode>Constant</Overall_bit_rate_mode>
<Overall_bit_rate>1 411 Kbps</Overall_bit_rate>
<Album>Album 020D5001</Album>
<Part_Position>0</Part_Position>
<Part_Total>0</Part_Total>
<Genre>Unknown/Unknown</Genre>
<Released_date>0000</Released_date>
<Recorded_date>0000/0000</Recorded_date>
<Original_source_form_Name>Album 020D5001</Original_source_form_Name>
<MCDI>Yes</MCDI>
</track>
<track type="Audio">
<Format>PCM</Format>
<Format_settings__Endianness>Little</Format_settings__Endianness>
<Format_settings__Sign>Signed</Format_settings__Sign>
<Codec_ID>1</Codec_ID>
<Duration>56mn 48s</Duration>
<Bit_rate_mode>Constant</Bit_rate_mode>
<Bit_rate>1 411.2 Kbps</Bit_rate>
<Channel_s_>2 channels</Channel_s_>
<Sampling_rate>44.1 KHz</Sampling_rate>
<Bit_depth>16 bits</Bit_depth>
<Stream_size>573 MiB (100%)</Stream_size>
</track>
這裏是我當前的XSL
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:mt="http://www.iana.org/assignments/media-types/" xmlns:la="http://www.loc.gov/standards/iso639-2/" xmlns:str="http://exslt.org/strings" extension-element-prefixes="str" xmlns="http://www.pbcore.org/PBCore/PBCoreNamespace.html" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsl:output encoding="UTF-8" method="xml" version="1.0" indent="yes"/>
<xsl:template match="Mediainfo">
<pbcoreCollection>
</pbcoreCollection>
</xsl:template>
<xsl:template match="File">
<pbcoreCollection>
<pbcoreDescriptionDocument>
<xsl:variable name="mediainfoSource">MediaInfoLib</xsl:variable>
<xsl:variable name="mediainfoVersion"><xsl:value-of select="../@version"/></xsl:variable>
<xsl:for-each select="track[@type='General']">
<!-- pbcoreTitle/pbcoreTitleType -->
<pbcoreTitle titleType="Collection">WNYC</pbcoreTitle>
<!-- pbcoreIdentifier/pbcoreIdentifierSource -->
<xsl:if test="Complete_name">
<pbcoreIdentifier>
<xsl:attribute name="source">WNYC Archive Catalog</xsl:attribute>
<xsl:value-of select="substring(Complete_name,30,5)"/>
</pbcoreIdentifier>
</xsl:if>
<!-- instantiationIdentifier/instantiationIdentifierSource -->
<pbcoreInstantiation>
<xsl:if test="Complete_name">
<instantiationIdentifier>
<xsl:attribute name="source">David Title</xsl:attribute>
<xsl:value-of select="substring(Complete_name,9,26)"/>
</instantiationIdentifier>
</xsl:if>
<!-- dates -->
<xsl:if test="Complete_name">
<instantiationDate>
<xsl:attribute name="dateType">Broadcast</xsl:attribute>
<xsl:value-of select="substring(Complete_name,19,10)"/>
</instantiationDate>
</xsl:if>
<instantiationDate>
<xsl:attribute name="dateType">Created</xsl:attribute>
<xsl:text>2013-09-14</xsl:text>
</instantiationDate>
<!-- formatDigital -->
<instantiationDigital><xsl:text>BWF</xsl:text></instantiationDigital>
<!-- formatLocation -->
<instantiationLocation>DAVID</instantiationLocation>
<!-- formatMediaType -->
<instantiationMediaType>Sound</instantiationMediaType>
<!-- formatGenerations -->
<instantiationGenerations>Master: preservation</instantiationGenerations>
<!-- formatFileSize -->
<xsl:if test="File_size"><!-- this expresses filesize as an integer count of bytes -->
<instantiationFileSize>
<xsl:attribute name="unitsOfMeasure">bytes</xsl:attribute>
<xsl:value-of select="normalize-space(File_size)"/>
</instantiationFileSize>
</xsl:if>
<!-- formatChannelConfiguration -->
<instantiationChannelConfiguration><xsl:text>Stereo</xsl:text></instantiationChannelConfiguration>
<!-- language -->
<instantiationLanguage><xsl:text>eng</xsl:text></instantiationLanguage>
<instantiationEssenceTrack>
<essenceTrackType>audio</essenceTrackType>
<essenceTrackIdentifier>
<xsl:attribute name="source">David Title</xsl:attribute>
<xsl:value-of select="substring(Complete_name,9,26)"/>
</essenceTrackIdentifier>
<essenceTrackStandard>Linear PCM</essenceTrackStandard>
<essenceTrackEncoding>Captured from CD via MF Digital Ripstation</essenceTrackEncoding>
<essenceTrackSamplingRate>44.1 kHz</essenceTrackSamplingRate>
<essenceTrackBitDepth>16</essenceTrackBitDepth>
</xsl:if>
</instantiationEssenceTrack>
</pbcoreInstantiation>
</xsl:for-each>
</pbcoreDescriptionDocument>
</pbcoreCollection>
</xsl:template>