Can I get help to get the desired output with Xquery? - xquery

Question

I have this DTD
<?xml version="1.0" encoding="utf-8"?>
<!ELEMENT MusicCatalog (Artist*,Album*,Genre+,Company*,Country*)>
<!ELEMENT Artist (Name)>
<!ELEMENT Name (FirstName,MiddleName*,LastName?)>
<!ELEMENT FirstName (#PCDATA)>
<!ELEMENT MiddleName (#PCDATA)>
<!ELEMENT LastName (#PCDATA)>
<!ATTLIST Artist ArtistID ID #REQUIRED
countryID IDREF #REQUIRED>
<!ELEMENT Album (Title,Price,Year)>
<!ELEMENT Title (#PCDATA)>
<!ELEMENT Price (#PCDATA)>
<!ELEMENT Year (#PCDATA)>
<!ATTLIST Album AlbumID ID #REQUIRED
ArtistID IDREF #REQUIRED
CompanyID IDREF #REQUIRED
GenreName IDREFS #REQUIRED >
<!ELEMENT Company (#PCDATA)>
<!ATTLIST Company CompanyID ID #REQUIRED>
<!ELEMENT Genre EMPTY>
<!ATTLIST Genre GenreName ID #REQUIRED>
<!ELEMENT Country (#PCDATA)>
<!ATTLIST Country countryID ID #REQUIRED>
and I Have this basic XML
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE MusicCatalog SYSTEM "Refined_DTD_For_catalog.dtd">
<MusicCatalog>
<Artist ArtistID="Ar_0000" countryID="US">
<Name>
<FirstName>Katey </FirstName>
<LastName>Berry</LastName>
</Name>
</Artist>
<Artist ArtistID="Ar_0001" countryID="US">
<Name>
<FirstName>Justine </FirstName>
<LastName>Temrilke</LastName>
</Name>
</Artist>
<Album AlbumID="AL_0000" ArtistID="Ar_0000" CompanyID="C_3" GenreName="Pop HipHop R_and_B">
<Title>Calfornia Girls</Title>
<Price>12</Price>
<Year>2012</Year>
</Album>
<Album AlbumID="AL_0001" ArtistID="Ar_0000" CompanyID="C_1" GenreName="Pop HipHop R_and_B">
<Title>Confessions</Title>
<Price>9</Price>
<Year>2008</Year>
</Album>
<Album AlbumID="AL_0002" ArtistID="Ar_0000" CompanyID="C_10" GenreName="Pop HipHop R_and_B">
<Title>Roar</Title>
<Price>13</Price>
<Year>2014</Year>
</Album>
<Album AlbumID="AL_0003" ArtistID="Ar_0000" CompanyID="C_4" GenreName=" HipHop R_and_B">
<Title>Teenge Dream</Title>
<Price>11</Price>
<Year>2010</Year>
</Album>
<Album AlbumID="AL_0004" ArtistID="Ar_0001" CompanyID="C_4" GenreName="HipHop R_and_B">
<Title>Future of sex</Title>
<Price>8</Price>
<Year>2007</Year>
</Album>
<Album AlbumID="AL_0005" ArtistID="Ar_0001" CompanyID="C_5" GenreName="HipHop">
<Title>Mirros</Title>
<Price>8</Price>
<Year>2013</Year>
</Album>
<Album AlbumID="AL_0006" ArtistID="Ar_0001" CompanyID="C_5" GenreName="Electro">
<Title>Holly Grail</Title>
<Price>9</Price>
<Year>2014</Year>
</Album>
<Album AlbumID="AL_0007" ArtistID="Ar_0001" CompanyID="C_6" GenreName="HipHop Electro">
<Title>Give it to me</Title>
<Price>5</Price>
<Year>2005</Year>
</Album>
<Genre GenreName="Rap"/>
<Genre GenreName="Country"/>
<Genre GenreName="R_and_B"/>
<Genre GenreName="HipHop"/>
<Genre GenreName="House"/>
<Genre GenreName="Pop"/>
<Genre GenreName="Electro"/>
<Genre GenreName="Blues"/>
<Genre GenreName="Punck"/>
<Genre GenreName="Rock"/>
<Genre GenreName="Metal"/>
<Genre GenreName="Alternative_Rock"/>
<Company CompanyID="C_1">
CBS Records
</Company>
<Company CompanyID="C_2">
RCA
</Company>
<Company CompanyID="C_3">
WEA
</Company>
<Company CompanyID="C_4">
Cloumbia
</Company>
<Company CompanyID="C_5">
Virgin Records
</Company>
<Company CompanyID="C_6">
Pickwick
</Company>
<Company CompanyID="C_7">
Atlantic
</Company>
<Company CompanyID="C_8">
Mega
</Company>
<Company CompanyID="C_9">
Grammy
</Company>
<Company CompanyID="C_10">
Wordo
</Company>
<Company CompanyID="C_11">
Fox
</Company>
<Country countryID="US">
United State
</Country>
<Country countryID="UK">
United Kingdom
</Country>
<Country countryID="FR">
France
</Country>
<Country countryID="GR">
Germany
</Country>
<Country countryID="ME">
Mexico
</Country>
<Country countryID="SP">
Spain
</Country>
<Country countryID="JP">
Japneas
</Country>
</MusicCatalog>
My problem with Xquery is I'm not getting what the expected result, in this query I'm trying to get companies name, create element with name and indie it to get the all albums titles but I'm getting only the company id, I tried to solve with many queries but most of it don't work
for $dc in distinct-values( //Album/#CompanyID )
return element {string ($dc)} {
for $j in //Album[#CompanyID = $dc] return $j/Title
}
This another try
for $i in distinct-values(//MusicCatalog/Album/#CompanyID)
return
if(compare($i,//MusicCatalog/Company/#CompanyID))
then "element {string(//MusicCatalog/Company)}"
{
for $j in //MusicCatalog/Album[#CompanyID eq $i] return $j/Title
}
}
I getting this
<c_3>
<title>Calfornia Girls</title>
<title>Roar/title>
</c_3>
while I want to get
<WEA>
<title>Calfornia Girls</title>
<title>Roar/title>
</WEA>
another problem is with getting genre albums beacuse it's mutlipe IDrefs .

Answer 1

If you want the company name as element name, you should not pass the id, but the name. I.e. search the name with another path expression:
for $i in distinct-values(//MusicCatalog/Album/#CompanyID)
return
element {translate(normalize-space(//MusicCatalog/Company[#CompanyID eq $i]), " ", "_")}
{
for $j in //MusicCatalog/Album[#CompanyID eq $i]
return $j/Title
}
}