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RE: xml langage that describe log files

• From: "DuCharme, Robert" <Robert.DuCharme@m...>
• To: "'xml-dev@l...'" <xml-dev@l...>
• Date: Tue, 20 Jun 2000 13:13:51 -0400

One issue with XML and log files is that people usually want to append log
events to their log files, but XML well-formedness requirements mean that
the entire file must be enclosed by a single container element. This could
mean, for example, inserting a new logEvent element before the logEvents
end-tag below instead of doing a simple append:

  <logEvents>
    <logEvent id="L1".../>
    <logEvent id="L2".../>
    <logEvent id="L3".../>
  </logEvents>

Fortunately, external general entities let you still implement this using
simple appends. If you add your log entries to the file logentries.txt in a
format like this,

  <logEvent id="L1".../>
  <logEvent id="L2".../>
  <logEvent id="L3".../>

then you could use the following well-formed document to process your log as
XML:

  <!DOCTYPE logEvents [
  <!-- logEvents and logEvent element type and attribute list declarations
if  you
       want it to be valid XML -->
  <!ENTITY logFile SYSTEM "logentries.txt">
  ]>
  <logEvents>&logFile;</logEvents>


Bob DuCharme          www.snee.com/bob           <bob@  
snee.com>  "The elements be kind to thee, and make thy
spirits all of comfort!" Anthony and Cleopatra, III ii

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