这种转变：
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:key name="kAssetByTypeName" match="Asset"
use="AssetTaxonamy/AssetTopics/AssetTopic[1]/@Type"/>
<xsl:key name="kAssetByTypeNameValue" match="Asset"
use="concat(AssetTaxonamy/AssetTopics/AssetTopic[1]/@Type,
AssetTaxonamy/AssetTopics/AssetTopic[1]
)
"/>
<xsl:template match="node()|@*">
<xsl:copy>
<xsl:apply-templates select="node()|@*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="Assets">
<Assets>
<xsl:for-each select=
"Asset[generate-id()
=
generate-id(key('kAssetByTypeName',
AssetTaxonamy/AssetTopics
/AssetTopic[1]/@Type
)
[1]
)
]
">
<xsl:variable name="vcurType" select=
"AssetTaxonamy/AssetTopics/AssetTopic[1]/@Type"/>
<Topic Type="{$vcurType}">
<xsl:for-each select=
"key('kAssetByTypeName',$vcurType)
[generate-id()
=
generate-id(key('kAssetByTypeNameValue',
concat($vcurType,
AssetTaxonamy/AssetTopics/AssetTopic[1]
)
)[1]
)
]
">
<xsl:variable name="vSubject" select=
"AssetTaxonamy/AssetTopics/AssetTopic[1]"/>
<Subject>
<xsl:value-of select="$vSubject"/>
</Subject>
<xsl:apply-templates select=
"key('kAssetByTypeNameValue',
concat($vcurType, $vSubject)
)
"/>
</xsl:for-each>
</Topic>
</xsl:for-each>
</Assets>
</xsl:template>
</xsl:stylesheet>
应用于提供的（更正为格式良好的）XML 文档时：
<Alerts AlertsName="">
<Alert UserId="13" OwnerId="13" OwnerName="jasprice" OwnerEmail="jatin.mehta@test.com" Scope="I">
<Assets>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Global business">Globalisation</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>Doing it the Chinese way: Disney's strategy for a lucrative ride in China</AssetTitle>
<AssetDescription>FROM INSEAD KNOWLEDGE As trite as the phrase ?think global, act local? may be, it nevertheless encapsulates The Walt Disney Company?s approach to making a success of its business in China. To that end, producing content that has a cultural and emotional resonance with Chinese consumers is crucial, says Stanley Cheung, Disney?s managing director for Greater China. ?We see it in China today, that ...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=467282231</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Sales and marketing">Marketing effectiveness</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>The empowered sales team: Enhancing productivity through thebetter use of information</AssetTitle>
<AssetDescription>FROM THE ECONOMIST INTELLIGENCE UNIT Sponsored by Microsoft Introduction Sales professionals create value by transforming their company?s raw product or service into a tailored solution for a customer?s needs. In a setting where customers have access to an unprecedented amount of product information, this is an increasingly challenging task. To thrive in this environment, companies...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=1297294514</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Sales and marketing">Customer management</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>On the front lines: The role of information in enhancing customer service</AssetTitle>
<AssetDescription>FROM THE ECONOMIST INTELLIGENCE UNIT Sponsored by Microsoft Introduction Customer service professionals play a critical role in most companies because they are the people customers are most often in contact with, especially when problems arise. In today?s unsettled market environment, the ability to build a deep understanding of evolving customer needs and expectations can make a com...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=1327294517</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Leadership">Managing change</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>World of leaders</AssetTitle>
<AssetDescription>FROM INDIAN SCHOOL OF BUSINESS At the inaugural ?ISB World of Leaders? speaker series event hosted by the Indian School of Business (ISB), Henry R Kravis, Co-Founder, Co-Chairman and Co-CEO, Kohlberg Kravis Roberts & Company (KKR), New York, interacted with a select group of Indian business leaders about how he started his enterprise, the journey so far and his views on the private equity industr...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=1757259560</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Global business">Country strategies</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>State industries in Lithuania: Follow the money</AssetTitle>
<AssetDescription>State-owned enterprises in eastern Europe are often a mess. Lithuania is trying to reform them DIG into the political undergrowth anywhere between the Baltic and the Black Seas and you soon find curious connections between state-owned enterprises, officials and politicians. They mostly escape public scrutiny--not least because politicians of all stripes tend to benefit from the state firms? large...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=67277991</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
</Assets>
</Alert>
</Alerts>
产生想要的分组：
<Alerts AlertsName="">
<Alert UserId="13" OwnerId="13" OwnerName="jasprice" OwnerEmail="jatin.mehta@test.com" Scope="I">
<Assets>
<Topic Type="Global business">
<Subject>Globalisation</Subject>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Global business">Globalisation</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>Doing it the Chinese way: Disney's strategy for a lucrative ride in China</AssetTitle>
<AssetDescription>FROM INSEAD KNOWLEDGE As trite as the phrase ?think global, act local? may be, it nevertheless encapsulates The Walt Disney Company?s approach to making a success of its business in China. To that end, producing content that has a cultural and emotional resonance with Chinese consumers is crucial, says Stanley Cheung, Disney?s managing director for Greater China. ?We see it in China today, that ...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=467282231</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
<Subject>Country strategies</Subject>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Global business">Country strategies</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>State industries in Lithuania: Follow the money</AssetTitle>
<AssetDescription>State-owned enterprises in eastern Europe are often a mess. Lithuania is trying to reform them DIG into the political undergrowth anywhere between the Baltic and the Black Seas and you soon find curious connections between state-owned enterprises, officials and politicians. They mostly escape public scrutiny--not least because politicians of all stripes tend to benefit from the state firms? large...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=67277991</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
</Topic>
<Topic Type="Sales and marketing">
<Subject>Marketing effectiveness</Subject>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Sales and marketing">Marketing effectiveness</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>The empowered sales team: Enhancing productivity through thebetter use of information</AssetTitle>
<AssetDescription>FROM THE ECONOMIST INTELLIGENCE UNIT Sponsored by Microsoft Introduction Sales professionals create value by transforming their company?s raw product or service into a tailored solution for a customer?s needs. In a setting where customers have access to an unprecedented amount of product information, this is an increasingly challenging task. To thrive in this environment, companies...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=1297294514</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
<Subject>Customer management</Subject>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Sales and marketing">Customer management</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>On the front lines: The role of information in enhancing customer service</AssetTitle>
<AssetDescription>FROM THE ECONOMIST INTELLIGENCE UNIT Sponsored by Microsoft Introduction Customer service professionals play a critical role in most companies because they are the people customers are most often in contact with, especially when problems arise. In today?s unsettled market environment, the ability to build a deep understanding of evolving customer needs and expectations can make a com...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=1327294517</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
</Topic>
<Topic Type="Leadership">
<Subject>Managing change</Subject>
<Asset>
<AssetTaxonamy>
<AssetTopics>
<AssetTopic Type="Leadership">Managing change</AssetTopic>
</AssetTopics>
</AssetTaxonamy>
<AssetTitle>World of leaders</AssetTitle>
<AssetDescription>FROM INDIAN SCHOOL OF BUSINESS At the inaugural ?ISB World of Leaders? speaker series event hosted by the Indian School of Business (ISB), Henry R Kravis, Co-Founder, Co-Chairman and Co-CEO, Kohlberg Kravis Roberts & Company (KKR), New York, interacted with a select group of Indian business leaders about how he started his enterprise, the journey so far and his views on the private equity industr...</AssetDescription>
<AssetLink>http://viewswire.eiu.com/index.asp?layout=EBArticleVW3&article_id=1757259560</AssetLink>
<AssetPubDate>7/23/2010</AssetPubDate>
<AssetArrivalDate>8/9/2010</AssetArrivalDate>
<AssetSource>Executive briefings / whitepapers</AssetSource>
</Asset>
</Topic>
</Assets>
</Alert>
</Alerts>
注意：使用 Muenchian 方法进行分组。