anchor.diff:  [options="header", cols="1,3,1"]
   |=================
   | Element | Description | Required
  +
   |meta|An instruction that the driver shall put a processing instruction (PI) which includes the meta-information of the original source document. The PIs shall be put as the first children of the document element. If there are multiple PIs to be put, their document order shall be the same as the order of these elements. | No; can be appear arbitrary number of times
  +
   |namespace|A pair of a namespace prefix and a namespace name which is mapped from the prefix. This mapping is used by descentant _Transform_, _All_ and _Snip_ drivers.| No; can be appear arbitrary number of times
  -|depends|Resources depended by this task additionally. The resources are used only to decide whether the corresponding output files are up to date.| No; can be appear arbitrary number of times
  +
  +|depends|Dependency between resources applied to the orignal source documents. This information are used only to decide whether the corresponding outputs are up to date. +
  +For details, see <<dependency.depends, "Depends element">> section. | No; can be appear arbitrary number of times
  +
   |transform|A _Transform_ sink. .4+| No; at least one sink required
  +
   |all|An _All_ sink.
  +
   |snip|A _Snip_ sink.
  +
   |output|An _Output_ sink.
  +
   |Other _MatchingTask_'s nested elements|Please consult Ant's document.|No
   |=================
   
  
positive.code: |=================
  
  
  === All filter
  
  An _All_ filter receives XML documents, collects all of their document elements,
  
negative.code: 
  If you want to know the version of your 'chionographis.jar', execute the Main-Class of the JAR:
  
  [source,shell]
  ----
  java -jar ./lib/chionographis.jar
  ----
  
  Instead, you can be informed of it by executing _Chionographis_ task with "debug" logging level:
  
  [source,shell]
  ----
  ant -d target-name
  ----
  