1. An XML Toolkit for Lightweight XML Stream Processing
DW Lab. 김연정

2. Contents XML toolkit commands details Xcat Xrun Xsort xgrep Xnest
xpair
Xflatten
createSIX

3. Xcat(1) Concatenates the give XML files
xcat [-r <root>] [-i <indentation>] (<xml file>)+
Example
Xcat –r item sample1.xml sample2.xml
sample2.xml
sample1.xml

4. Xcat(2)
Result

5. Xrun(1)
Sub-part of input xml that satisfies the given Xpath expression
Xrun <xpath expression> <xmlfile>
Examples
xrun “/” sample2.xml
xrun “/books/book/title” sample2.xml

6. Xrun(2)
result
Result1.xml
Result2.xml

7. Xsort(1) Sorts target elements under a given context
Xsort [-m <mem size>] [-i <indentation size>] c <context> [-e <element to include> [-k “<key comparison>”]]+[<input file>]
Example
Xsort –c “root/bib” –e “*” –k “year” sample.xml

8. Xsort(2)
Result
Result.xml
sample.xml

9. Xgrep(1)
Copies to the output everything that is not under a context. For a context, it only copies the items that match an element expression and that satisfy the key comparison.
Xgrep –c context [-e <element to include>
-k ”<key comparison>”]]+[<input>]
Example
xgrep –c root/bib –e paper –k “year/text() > 1999” sample.xml

10. Xgrep(2)
Result
result.xml
sample.xml

11. Xnest(1)
Groups adjacent elements that have the same key under a common group tag
Xnest [-gt <group-tag-name>]
[-kt <key-tag-name>]
–e <element to include>
(-k <key> | -n number) [<input file>]
Example
xnest –gt books –e /root/bib/book sample3.xml

12. Xnest(2)
Result
Result.xml
sample3.xml

13. Xpair(1) Pairs elements up with a context element under a pair tag
xpair [–p <pair tag>] –e <element to duplicate> g <element to pair up> [<input file>]
Example
xpair –p desc –e /root/bib/*/author –g /root/bib/*/title sample.xml

14. Xpair(2)
Result
Result.xml
sample.xml

15. Xflatten(1)
Removes the top-most element that matches the given XPath expression. (only removes element tags, not content)
Xflatten [-r recursive remove] –e <element to remove> [input file]
Example
xflatten –e papers/paper/year sample1.xml

16. Xflatten(2)
Result
sample1.xml
result.xml

17. createSIX Creates a streaming index(SIX) for the input xml file.
createSIX [-t <threshold>] <input file>
Example
createSIX sample.xml
Result

18. Example Complex data operations
Xcat –r item sample1.xml sample2.xml | xsort –c “item/books” –e “book” –k “title”
Result