递归使用dos2unix

cd $1

echo `pwd`

for file in $(find -type f); do

        echo $file

        dos2unix $file

done

 

Regards,

Tao

 

cut

使用 cut 工具，我们可以将构成文件中数据域的各个列分隔开来。默认的分隔符是制表符，-f 选项可以用来指定希望显示的域。

举例来说，假设一个文本文件 "sample" 有三列，其内容如下所示：

one two threefour five sixseven eight nineten eleven twelve

现在执行下面的命令：

# cut -f2 sample

这会返回：

two sixseven eleven

如果将这个命令修改成：

# cut -f1, 3 sample

这会返回下面的不同结果：

one threefour five eight nineten twelve

这个命令有几个命令行选项。除了 -f 之外，我们还应该熟悉下面两个选项：

• -c ―― 允许我们指定字符而不是域。
• -d ―― 允许我们指定其他分隔符，而不是制表符。

Regards,

Tao

shell 中冒号的用法

:

空命令[冒号]. 这个命令意思是空操作(即什么操作也不做). 它一般被认为是和shell的内建命令true是一样的。冒号":" 命令是Bash自身内建的, and its它的退出状态码是真(即0)

 

same as "#" to put the comments or comment out the codes  .
advantage to use ": "  for multiple line comment out  .

: '
code1
code2
code3   
'

like C use "/* */" for comment out

 

: <<!
sas
sasa
!

 

Regards,

Tao

 

paper list

paper list for keyword search in XML

 

[1] Cohen, S., J. Mamou, Y. Kanza, Y. Sagiv. XSEARCH: A Semantic

Search Engine for XML. VLDB 2003.

[2] Yu Xu and Yannis Papakonstantinou. Efficient Keyword Search for Smallest LCAs in

XML Databases. In Proc. of SIGMOD, 2005.

[3] Vagelis Hristidis, Yannis Papakonstantinou, and Andrey Balmin. Keyword Proximity

Search on XML Graphs. In Proc. of ICDE, 2003.

[4] Lin Guo, Feng Shao, Chavdar Botev, and Jayavel Shanmugasundaram. XRANK: Ranked

Keyword Search over XML Documents. In Proc. of SIGMOD, 2003.

[5] Fuhr, N., Groohann, K. XIRQL: A Language for Information

Retrieval in XML Documents. SIGIR 2001.

[6] Daniela Florescu, Donald Kossmann, and Ioana Manolescu. Integrating Keyword Search

into XML Query Processing. In Proc. of IJCTN, 2000.

[7] Shurug Al-Khalifa, Cong Yu, and H. V. Jagadish. Querying Structured Text in an XML

Database. In Proc. of SIGMOD, 2003.

[8] Sara Cohen, Yaron Kanza, Benny Kimelfeld, Yehoshua Sagiv: Interconnection semantics

 for keyword search in XML. CIKM 2005: 389-396

[9]    Vagelis Hristidis, Nick Koudas, Yannis Papakonstantinou, Divesh Srivastava:

Keyword Proximity Search in XML Trees. IEEE Trans. Knowl. Data Eng. 18(4): 525-539 (2006)

[10] Andrey Balmin, Vagelis Hristidis, Nick Koudas, Yannis Papakonstantinou,

Divesh Srivastava, Tianqiu Wang: A System for Keyword Proximity Search on XML Databases.

[11] Ralf Schenkel, Martin Theobald: Structural Feedback for Keyword-Based XML Retrieval. ECIR 2006:

[12] Xiaoguang Li, Jian Gong, Daling Wang, Ge Yu: An Effective and Efficient Approach for Keyword-Based XML Retrieval. WAIM 2005: 56-67

[13] Cong Yu, H. V. Jagadish, Dragomir R. Radev: Querying XML using structures and keywords in timber. SIGIR 2003:

[14]

VLDB 2003: 1069-1072

[11] Chavdar Botev, Jayavel Shanmugasundaram: Context-Sensitive Keyword Search and Ranking for XML. WebDB 2005:

[12] Theobald, A., Weikum, G. The Index-Based XXL Search Engine for

Querying XML Data with Relevance Ranking. EDBT 2002.

[13] Florescu, D., Kossmann, D., Manolescu, I. Integrating Keyword

Search into XML Query Processing. WWW 2000.

 

paper list for dynamic XML

 

[1] Jeffrey Xu Yu, Daofeng Luo, Xiaofeng Meng, Hongjun Lu:

Dynamically Updating XML Data: Numbering Scheme Revisited.

World Wide Web 8(1): 5-26 (2005)

[2] Maggie Duong, Yanchun Zhang: LSDX: A New Labelling Scheme for Dynamically Updating XML Data. ADC 2005:

[3] Lau Hoi Kit, Vincent Ng: Enumerating XML Data for Dynamic Updating. ADC 2005: 75-84

[4] Yun Shen, Ling Feng, Tao Shen, Bing Wang: A Self-adaptive Scope Allocation Scheme for Labeling Dynamic XML Documents. DEXA 2004:

[5] Xiaodong Wu, Mong-Li Lee, Wynne Hsu: A Prime Number Labeling Scheme for Dynamic Ordered XML Trees. ICDE 2004: 66-78

[6] Adam Silberstein, Hao He, Ke Yi, Jun Yang: BOXes: Efficient Maintenance of Order-Based Labeling for Dynamic XML Data. ICDE 2005: 285-296

[7] Changqing Li, Tok Wang Ling, Min Hu: Efficient Processing of Updates in Dynamic XML Data. ICDE 2006: 13

[8] Edith Cohen, Haim Kaplan, Tova Milo: Labeling Dynamic XML Trees. PODS 2002: 271-281

[9] Sung Wan Kim, Jaeho Lee, Hae Chull Lim: Indexing and Retrieval of XML-Encoded Structured Documents in Dynamic Environment. EDCIS 2002:

[10]Yi Chen, George A. Mihaila, Rajesh Bordawekar, Sriram Padmanabhan: L-Tree: A Dynamic Labeling Structure for Ordered XML Data. EDBT Workshops 2004:

[11]Takeharu Eda, Yasushi Sakurai, Toshiyuki Amagasa, Masatoshi Yoshikawa, Shunsuke Uemura, Takashi Honishi: Dynamic Range Labeling for XML Trees. EDBT Workshops 2004: 230-239

[12]Hyoseop Shin, Andrei V. Popov: A Lightweight XML Repository Supporting Dynamic Partial Update of XML Data. DASFAA 2004: 220-225

[13]Changqing Li, Tok Wang Ling: An Improved Prefix Labeling Scheme: A Binary String Approach for Dynamic Ordered XML. DASFAA 2005:

[14]Damien K. Fisher, Raymond K. Wong: Adaptively Indexing Dynamic XML. DASFAA 2006:

[15]Carolyn J. Crouch, Sudip Khanna, Poorva Potnis, Nagendra Doddapaneni: The Dynamic Retrieval of XML Elements. INEX 2005: 268-281