pls help:)

Question

pls help:)

ajprincess · Answer

<!ELEMENT f((a|b)*, c+,(d|e))*>
how can we write this in xml document

ajprincess · Answer

@ganeshie8

ganeshie8 · Answer

not good with xml :( @e.mccormick

mathslover · Answer

http://www.cs.rit.edu/~ats/plcr-2003-1/html/skript-22.html will this work?

ganeshie8 · Answer

`<!ELEMENT f((a|b)*, c+,(d|e))*>`

looks like a comment syntax right ?

mathslover · Answer

Sorry to disturb again.. but I just got one more link :P http://docs.oracle.com/cd/E16655_01/appdev.121/e17604/adx_cp_classgen.htm#ADXDK19948 I will not disturb now.. final! :P

ganeshie8 · Answer

@mathslover i can see you have used xml before :) please go ahead, help ajp...

mathslover · Answer

Oh yeah... Sure! :P I once made an XML code having some lists of my favourite chocolates... ! it was a year ago.. and I even forgot that :P this seems to be much easier, so, I have forgot this too! (you know, I only remember the *tough* codes.. :P ) 

(jokes apart - I am only good at Maths, Physics and Chemistry... I was taking CS50 course but left it, due to schools... ! Though, am good at Scratch projects! )

--------sorry---- i can't help ----

ganeshie8 · Answer

` f((a|b)*, c+,(d|e))` is this supposed to be some regular expression ?

ganeshie8 · Answer

lol @mathslover ikr... its very easy to forget these syntax things if we don't use it for a long time

mathslover · Answer

:-) is this called XML DTD ?

ajprincess · Answer

yup it is
<f>
<a></a>
<c></c>
<c></c>
<d></d>
</f>

mathslover · Answer

If we have : Tove Jani Reminder Don't forget me this weekend! then XML DTD : ]>

anonymous · Answer

ehh, xml. One of the things I don't know :(

ajprincess · Answer

ya I am okay with that. what exactly is my problem is writing this part (a|b)*

ganeshie8 · Answer

does that mean "0 or more of a or b" ?

ajprincess · Answer

yes then xml

mathslover · Answer

just tell me what is <!ELEMENT..> ? is this C or C++ or is it english ( lol ) ?

mathslover · Answer

Declaring either/or Content
Example:

<!ELEMENT note (to,from,header,(message|body))>
The example above declares that the "note" element must contain a "to" element, a "from" element, a "header" element, and either a "message" or a "body" element.

ajprincess · Answer

in dtd tag is referred to as element

mathslover · Answer

Did that help @ajprincess ^ ?

ganeshie8 · Answer

okay then you can skip both and elements i think

ganeshie8 · Answer

regular expression $x*$ means 0 or more of $x$, so based on that $(a|b)*$ can have 0 or more of and elements in the start.... just a guess -.-

ganeshie8 · Answer

but you cannot have both and

mathslover · Answer

So, you want to declare zero or more occurrences of parsed characted data?

mathslover · Answer

*character

ajprincess · Answer

ya @mathlover. thanx. but it was nt exactly what i was looking for. so it will be this then xml

mathslover · Answer

so, that ya was for which comment ? is this for "So, you want to declare zero or more occurrences of parsed characted data? 
" ? 

Also, what r u looking for now? So that I can help u accordingly.

ajprincess · Answer

it was for does that help? your example from w3schools

mathslover · Answer

Oh yes..

ajprincess · Answer

i want to knw if this is right then xml

mathslover · Answer

lemme check that... give me 2 minutes.

mathslover · Answer

oops no.. I need 121.9 seconds!

ajprincess · Answer

oh k.take ur own time. 1.9 more seconds? lol k

ajprincess · Answer

i checked my answer using oxygen xml editor but what i am getting is (a|b)? instead of (a|b)*. if it is ? then the tag can occur 0 or 1 time. but in my answer i have a tag more than once. so it cannot be ?.

ganeshie8 · Answer

put two elements for <a>  in one entry and try

ganeshie8 · Answer

```
  <f>
    <a></a>
    <a></a>
    <c></c>
    <d></d>
 </f>
```

ajprincess · Answer

if i do so i get this way (a+|b)

ganeshie8 · Answer

add that ^

ganeshie8 · Answer

(a|b)? = 0 or 1 of , (a|b)* = 0 or MORE of ,

ganeshie8 · Answer

you can have as many <a> elements as you want in the start, including nothing.

ajprincess · Answer

u mean within the same <f> element?

ganeshie8 · Answer

yes a,b,c,d,e are children of f, right ?

ajprincess · Answer

ya. it will be this way

ganeshie8 · Answer

you will need 72 elements i think : : 0/1/2 times : 0/1/2 times : 1/2 times : 0/1/2 times : 0/1/2 times total = (3+3)*(2)*(3+3) = 72

mathslover · Answer

stop everyone... I'm trying.. please :P 

121.989 seconds more please!

mathslover · Answer

@ganeshie8 / @ajprincess - can any of u send me the .xml file of the dtd code?

ganeshie8 · Answer

im just giving out my best guess - never worked that much on xml stuff >.<

ganeshie8 · Answer

i can generate the 72 elements if any of u want to check in oxygen...

mathslover · Answer

don't worry I'm here ... but just attach the xml file ... due to some reasons, my text document stopped working.

mathslover · Answer

this will be the dtd code for what ajprincess posted...

mathslover · Answer

wow cool! i seem to be getting it now..

ajprincess · Answer

if u dnt mind can u please give it @ganeshie8

mathslover · Answer

yep... i asked him too! he is making it

mathslover · Answer

ajprincess , why dont u use xml to dtd converter? it will help u !

ajprincess · Answer

if it is so a, b, c, d and e wont be present within one entry of f

mathslover · Answer

i agree but it is what I get when I convert the xml to dtd...

mathslover · Answer

This is what the software says for your xml code

ajprincess · Answer

ya I used oxygen xml editor. it also converts xml to dtd. this is what i got for my answer.

mathslover · Answer

while you want for `*` instead of `?` right?

ajprincess · Answer

ya

mathslover · Answer

cool :P

ajprincess · Answer

this is what i get when i convert your code @ganeshie8

mathslover · Answer

yeah.. he forgot to use "e" there.. ?

mathslover · Answer

I don't get where else is the mistake.. everything seems fine to me in ganeshies' code.

ganeshie8 · Answer

fixed :

ganeshie8 · Answer

good catch @mathslover  :)

mathslover · Answer

:)

ajprincess · Answer

now this is what i get when i convert

mathslover · Answer

it was expected...

ajprincess · Answer

yes. but what i want is this

mathslover · Answer

Yehaaaaaaaaaaaaaa I think, I got it.

mathslover · Answer

one minute .. (lol no... 61.99230 seconds)

ganeshie8 · Answer

whats the difference between `(a|b)*` and `(a*|b*)` ?

mathslover · Answer

thats the point ganeshie... think about the diff. in

a | b
and 
aa | bb

ganeshie8 · Answer

both look equivalent  to meh

(a|b)* = a*|b*

ajprincess · Answer

(a|b)* means (a|b) occurs 0 or more times
(a*|b*) means a occurs 0 or more times or b occurs 0 or more times

ganeshie8 · Answer

(a*|b*) matches both `aa` and `bb`

ganeshie8 · Answer

a*|b* also matches them both ^ hmm

ajprincess · Answer

i am really confused because i got a question this way also
(a*|b)*

ganeshie8 · Answer

oh

mathslover · Answer

hmm.............  ! I got the mistake - we should read the material again..

ganeshie8 · Answer

My guess :

(a|b)* matches  `abaabbbbaa`

ganeshie8 · Answer

let me give u another xml file to test it...

ajprincess · Answer

k

mathslover · Answer

I have a bad doubt : * means, the child-name can occur 0 or more times right? then why only limit the times to 2?

ajprincess · Answer

jst for simplicity

ganeshie8 · Answer

attachment

ganeshie8 · Answer

try that ^

ajprincess · Answer

<?xml encoding="UTF-8"?>

<!ELEMENT h (f)+>
<!ATTLIST h
  xmlns CDATA #FIXED ''>

<!ELEMENT f (a*,b*,c+,d*,e*)>
<!ATTLIST f
  xmlns CDATA #FIXED ''>

<!ELEMENT a EMPTY>
<!ATTLIST a
  xmlns CDATA #FIXED ''>

<!ELEMENT b EMPTY>
<!ATTLIST b
  xmlns CDATA #FIXED ''>

<!ELEMENT c EMPTY>
<!ATTLIST c
  xmlns CDATA #FIXED ''>

<!ELEMENT d EMPTY>
<!ATTLIST d
  xmlns CDATA #FIXED ''>

<!ELEMENT e EMPTY>
<!ATTLIST e
  xmlns CDATA #FIXED ''>

mathslover · Answer

if we get to know what is the difference between (a*|b*) and (a|b)* then we will get our answer... !

ganeshie8 · Answer

yes

ganeshie8 · Answer

il give one more last try :)

ganeshie8 · Answer

attachment

ganeshie8 · Answer

@ajprincess  please try that