XSLT Select all nodes containing a specific substring_问答_开发者

XSLT Select all nodes containing a specific substring

开发者 https://www.devze.com 2023-02-04 02:12 出处：网络

I\'m trying to write an XPath that will select certain nodes that contain a specific word. In this case the word is, \"Lockwood\".The correct answer is 3. Both of these paths give me 3.

相关专题：xslt

I'm trying to write an XPath that will select certain nodes that contain a specific word. In this case the word is, "Lockwood". The correct answer is 3. Both of these paths give me 3.

count(//*[contains(./*,'Lockwood')])
count(BusinessLetter/*[contains(../*,'Lockwood')])

But when I try to output the text of each specific node

//*[contains(./*,'Lockwood')][1]
//*[contains(./*,'Lockwood')][2]
//*[contains(./*,'Lockwood')][3]

Node 1 ends up containing all the text and nodes 2 and 3 are blank.

Can some one please tell me what's happening or what I'm doing wrong.

Thanks.

<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="XPathFunctions.xsl"?>
<BusinessLetter>
 <Head>
  <SendDate>November 29, 2005</SendDate>
  <Recipient>
   <Name Title="Mr.">
    <FirstName>Joshua</FirstName>开发者_JAVA百科
    <LastName>Lockwood</LastName>
   </Name>
   <Company>Lockwood &amp; Lockwood</Company>
   <Address>
    <Street>291 Broadway Ave.</Street>
    <City>New York</City>
    <State>NY</State>
    <Zip>10007</Zip>
    <Country>United States</Country>
   </Address>
  </Recipient>
 </Head>
 <Body>
  <List>
   <Heading>Along with this letter, I have enclosed the following items:</Heading>
   <ListItem>two original, execution copies of the Webucator Master Services Agreement</ListItem>
   <ListItem>two original, execution copies of the Webucator Premier Support for Developers Services Description between Lockwood &amp; Lockwood and Webucator, Inc.</ListItem>
  </List>
  <Para>Please sign and return all four original, execution copies to me at your earliest convenience.  Upon receipt of the executed copies, we will immediately return a fully executed, original copy of both agreements to you.</Para>
  <Para>Please send all four original, execution copies to my attention as follows:

 <Person>
    <Name>
     <FirstName>Bill</FirstName>
     <LastName>Smith</LastName>
    </Name>
    <Address>
     <Company>Webucator, Inc.</Company>
     <Street>4933 Jamesville Rd.</Street>
     <City>Jamesville</City>
     <State>NY</State>
     <Zip>13078</Zip>
     <Country>USA</Country>
    </Address>
   </Person>
  </Para>
  <Para>If you have any questions, feel free to call me at <Phone>800-555-1000 x123</Phone> or e-mail me at <Email>bsmith@webucator.com</Email>.</Para>
 </Body>
 <Foot>
  <Closing>
   <Name>
    <FirstName>Bill</FirstName>
    <LastName>Smith</LastName>
   </Name>
   <JobTitle>VP of Operations</JobTitle>
  </Closing>
 </Foot>
</BusinessLetter>

But when I try to output the text of each specific node
//*[contains(./*,'Lockwood')][1] 
//*[contains(./*,'Lockwood')][2] 
//*[contains(./*,'Lockwood')][3] 
Node 1 ends up containing all the text and nodes 2 and 3 are blank

This is a FAQ.

//SomeExpression[1]

is not the equivalent to

(//someExpression)[1]

The former selects all //SomeExpression nodes that are the first child of their parent.

The latter selects the first (in document order) of all //SomeExpression nodes in the whole document.

How does this apply to your problem?

//*[contains(./*,'Lockwood')][1]

This selects all elements that have at least one child whose string value contains 'Lockwood' and that are the first such child of their parent. All three elements that have a text node containing the string 'Lockwood' are the first such child of their parents, so the result is that three elements are selected.

//*[contains(./*,'Lockwood')][2]

There is no element that has a child with string value containing the string 'Lockwood' and is the second such child of its parent. No nodes are selected.

//*[contains(./*,'Lockwood')][3]

There is no element that has a child with string value containing the string 'Lockwood' and is the third such child of its parent. No nodes are selected.

Solution:

Use:

(//*[contains(./*,'Lockwood')])[1]
(//*[contains(./*,'Lockwood')])[2]
(//*[contains(./*,'Lockwood')])[3]

Each of these selects exactly the Nth element (N = {1,2,3}) selected by //*[contains(./*,'Lockwood')], correspondingly: BusinesLetter, Recipient and Body.

Remember:

The [] operator has higher priority (precedence) than the // abbreviation.