XML%20eXtensible%20Markup%20Language

1
XML eXtensible Markup Language

1. ??????????? ???? ?????????? (DTD)
2. ???? ????????? ?????? XML-????????? (XPath)

2
??????????? ???? (DTD)

• DTD Document Type Definition
• ?????? ????????? ????????? ??? ?????????? ????
  XML-??????????(?. ?. ?????? ???? ????????? ????)
• ??? ????? ?????????? ????????
• ??? ??? ????? ???? ? ????? ????????????
• ????? ? ??????? ???????? ????? ???? ????????

3
????????? XML-????????

• www.firstobject.com
• (?????? ?????? 2.2.5, exe ? ?????? zip)

4
??????? XML-????????

• lt?xml version"1.0" encoding"UTF-8"?gt
• lt!DOCTYPE booklist SYSTEM "books-1.dtd"gt
• ltbooklistgt
• ltbookgt
• ltauthorgt?.?. ????????lt/authorgt
• lttitlegt????????????? ?????????lt/titlegt
• ltcitygt??????lt/citygt
• ltyeargt2008lt/yeargt
• lt/bookgt
• ltbookgt
• ltauthorgtJ.K. Rowlinglt/authorgt
• lttitlegtHarry Potter and the Secret
  Chamberlt/titlegt
• ltcitygtNew Yorklt/citygt
• ltyeargt2005lt/yeargt
• lt/bookgt
• lt/booklistgt

5
??????????? ???? (DTD)

• lt?xml version"1.0" encoding"UTF-8"?gt
• lt!ELEMENT booklist (book)gt
• lt!ELEMENT book (author, title, city, year)gt
• lt!ELEMENT author (PCDATA)gt
• lt!ELEMENT title (PCDATA)gt
• lt!ELEMENT city (PCDATA)gt
• lt!ELEMENT year (PCDATA)gt

6
??????????? ???? (DTD)

• ?????????? ?????????
• lt!ELEMENT book (author, title, city, year)gt
• author, title ??????????????????
• authortitle ????? (??? ???)
• EMPTY ?????? ???????
• ANY ????? ?????????? ?????????? ?????
• PCDATA Parsed Character Data

?????? ???????? ?????????
7
??????????? ???? (DTD)

• ?????????? ?????????? ????????
• lt!ELEMENT booklist (book)gt
• book 1, ????????????
• book? 1, ?????????????? (0 ??? 1)
• book 1 ??? ?????? (??????? ??????)
• book 0 ??? ?????? (??????? ??????)
• ??????? ? book ?????????????? ??????? publisher?
  (????????????)

8
??????????? ???? (DTD)

• ????????? ????????
• ? ????????
• ltbook lang"rus" bookid"AAZ01"gt
• ltauthorgt?.?. ????????lt/authorgt
• lt/bookgt
• ? DTD
• lt!ATTLIST book
• lang CDATA IMPLIED
• bookid ID REQUIREDgt

??? ????????
9
??????????? ???? (DTD)

• ???? ?????????
• lt!ATTLIST book
• lang CDATA IMPLIED
• bookid ID REQUIRED
• genre (fictionnonfiction) IMPLIEDgt
• CDATA ??????? ????? (Character data)
• ID ????????????? (???????? ?? ?????
  ???????????)
• IDREF ?????? ?? ????????????? ??????? ????????
• (....) ???? ?? ????????????? ????????

10
??????????? ???? (DTD)

• ???????? ????????? ?? ?????????
• lt!ATTLIST book
• lang CDATA "eng"
• bookid ID REQUIRED
• genre (fictionnonfiction) IMPLIEDgt
• ???? ???????? ????????, ????
• IMPLIED ??????? ????????????
• REQUIRED ??????? ????????????
• FIXED ???????? ???????? ?????????

11
XPath ????????? ?????? ?????????

• ???????? ???????
• ????? ????? (nodeset)????????? ?? XPath (????)
  ????????? ????? ????? ? ?????????
• ????????
• ????????
• ?????? ????????? (???????? ???????)
• ?????????? / ????????????? ????
• ????????-????
• ???????? (???? ?????? ??????)
• ??????-???????

12
XPath ????????? ?????? ?????????

• ??????? ?????????
• ???? ?? ????? (??????????) ?????????? ? /
• ???????? ???? ????? ????? / ??? ?? ?????? (??
  ????????? ?? ????? ? ???????)
• ? ????????? ?????? ??? ????, ?????????? ???
  ????????? ????
• /booklist /booklist/book/author
• ???? ??? / (?????????????) ????????? ?? ?? ?????,
  ? ?? ??????? ???????
• book/author
• // ????? ?????????? ?????
• //book //author /booklist//author
• _at_ ???????
• //book/_at_lang

13
XPath ????????? ?????? ?????????

• ??????? ?????????
• . (?????) ??????? ????
• .. (??? ?????) ???????????? ????
• ../title (???? ?? book/author ? book/title)
• ????? ???? ??? ???????? ?????
• /booklist/ ??? ????
• /booklist// ??? ?????
• //book/_at_ ??? ????????

14
XPath ????????? ?????? ?????????

• ????????? ? ???????? (??????????)
• ??????? ?? ?????????? ????? ???? ? ??????
• book2 booklast() bookposition()lt3
• ??????? ?? ???????? ????????? (????
  ????????????? ?? ??????? ???????)
• bookcity??????
• bookpricegt250
• ??????? ?? ???????? ?????????
• //book_at_langrus/title
• ??????? ??????????? ? ???? ????, ?????
  ???????? ?????
• book1/author vs. book/author1