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newbie question.. what's process instruction?

newbie question.. what's process instruction?# XML - WWW明日之星

b*e2000-08-23 07:08

1 楼

rt..

s*n2000-08-23 07:08

2 楼

from http://www.w3.org/TR/1998/REC-xml-19980210#sec-pi
2.6 Processing Instructions
Processing instructions (PIs) allow documents to contain
instructions for applications.
Processing Instructions
[16] PI ::= '' Char*)))? '?>'
[17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
PIs are not part of the document's character data, but must
be passed through to the application. The PI begins with a
target (PITarget) used to identify the application to whic

【在 b****e 的大作中提到】

: rt..

b*e2000-08-23 07:08

3 楼

so what's the difference between a docType and a PI?
are they both
thanks

【在 s******n 的大作中提到】

: from http://www.w3.org/TR/1998/REC-xml-19980210#sec-pi
: 2.6 Processing Instructions
: Processing instructions (PIs) allow documents to contain
: instructions for applications.
: Processing Instructions
: [16] PI ::= '' Char*)))? '?>'
: [17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
: PIs are not part of the document's character data, but must
: be passed through to the application. The PI begins with a
: target (PITarget) used to identify the application to whic

s*k2000-08-23 07:08

4 楼

我的愚见: DTD类似于数据类型，表明的是数据本身的类型定义，
PI则是为处理xml/sgml的软件给出的提示。

【在 b****e 的大作中提到】

: so what's the difference between a docType and a PI?
: are they both
: thanks

b*e2000-08-23 07:08

5 楼

i asked the difference btw a docTYPE and a PI.. not DTD.
so if i call getDocType and getProcessInstruction on
a standard xml document.. with the header i gave below..
what do they return?

【在 s*k 的大作中提到】

: 我的愚见: DTD类似于数据类型，表明的是数据本身的类型定义，
: PI则是为处理xml/sgml的软件给出的提示。

s*k2000-08-23 07:08

6 楼

I guess you will get all the content in your <> by getDocType
and nothing from getProcessInstruction.
from specification, PItarget can not have any name with
(('X' | 'x') ('M' | 'm') ('L' | 'l')).

【在 b****e 的大作中提到】

: i asked the difference btw a docTYPE and a PI.. not DTD.
: so if i call getDocType and getProcessInstruction on
: a standard xml document.. with the header i gave below..
: what do they return?

s*n2000-08-23 07:08

7 楼

somewhat confused....
don't know about getDocType() and getProcessingInstruction()
also can't find them in DOM API.
PI is a type of node, just like Element, Attributer,
Text......
Document is container, owning a bundle of nodes,
so there should be some sort of different between them.

【在 b****e 的大作中提到】

: i asked the difference btw a docTYPE and a PI.. not DTD.
: so if i call getDocType and getProcessInstruction on
: a standard xml document.. with the header i gave below..
: what do they return?

b*e2000-08-23 07:08

8 楼

getDocType gives you
getPI() gives you i think :) never used getPI anywhere tho..

【在 s******n 的大作中提到】

: somewhat confused....
: don't know about getDocType() and getProcessingInstruction()
: also can't find them in DOM API.
: PI is a type of node, just like Element, Attributer,
: Text......
: Document is container, owning a bundle of nodes,
: so there should be some sort of different between them.