how to get a xquery with like? - xquery

Question

i am trying to get the elements containing the words "Placa Base" ,"micro",memoria" .
i want somthing like that :
<placa>
<denominacion>Placa Base MSI G41M-P26</denominacion>
</placa>
<micro>
<denominacion>Micro Intel Core i5-2320</denominacion>
</micro>
<micro>
EDIT:
I tried this:
for $zone in /productos/produc
let $placa := /productos/produc[contains(lower-case(.),"placa")]/denominacion
let $micro := /productos/produc[contains(lower-case(.),"micro")]/denominacion
let $mem := /productos/produc [ contains (lower-case(.),"memoria")]/denominacion
let $altres:=/productos/produc[ contains(lower-case (.),"hd")]/denominacion
let $altres1:=/productos/produc[ contains(lower-case (.),"tarjeta")]/denominacion
return <placas><placa>{ data($placa) }</placa>
<micro>{ data($micro) }</micro>
<memoria>{ data($mem) }</memoria>
<altres>{ data($altres) }</altres>
<altres>{ data($altres1) }</altres>
</placas>
but the result was that:
<placas>
<placa>Placa Base MSI G41M-P26 Placa Base ASRock G41M-S3 </placa>
<micro>Micro Intel Core i5-2320 Micro Intel Core i5 2500 Micro Intel Dual Core G620</micro>
<memoria>Memoria DDR3 G.Skill 2GB Memoria DDR3 G.Skill 4GB Memoria DDR3 Kingston HyperX 4GB</memoria>
<altres>HD Seagate Barracuda 250GB SATA HD Caviar Blue 500GB SATA3</altres>
<altres>Tarjeta gráfica Asus GeForce EN210 Silent 1GB Tarjeta gráfica Gigabyte GeForce 1GB Tarjeta gráfica Nvidia Express 1GB</altres>
</placas>
<placas>
<placa>Placa Base MSI G41M-P26 Placa Base ASRock G41M-S3 </placa>
<micro>Micro Intel Core i5-2320 Micro Intel Core i5 2500 Micro Intel Dual Core G620</micro>
<memoria>Memoria DDR3 G.Skill 2GB Memoria DDR3 G.Skill 4GB Memoria DDR3 Kingston HyperX 4GB</memoria>
<altres>HD Seagate Barracuda 250GB SATA HD Caviar Blue 500GB SATA3</altres>
<altres>Tarjeta gráfica Asus GeForce EN210 Silent 1GB Tarjeta gráfica Gigabyte GeForce 1GB Tarjeta gráfica Nvidia Express 1GB</altres>
</placas>
......
......
......
Now ,i have the problem on the iteration ,i just want to show the result once .
The xml:
<productos>
<TITULO>DATOS DE LA TABLA PRODUCTOS</TITULO>
<produc>
<cod_prod>1010</cod_prod>
<denominacion>Placa Base MSI G41M-P26</denominacion>
<precio>50</precio>
<stock_actual>10</stock_actual>
<stock_minimo>3</stock_minimo>
<cod_zona>10</cod_zona>
</produc>
<produc>
<cod_prod>1011</cod_prod>
<denominacion>Micro Intel Core i5-2320</denominacion>
<precio>120</precio>
<stock_actual>3</stock_actual>
<stock_minimo>5</stock_minimo>
<cod_zona>10</cod_zona>
</produc>
...
Thanks.

Answer 1

This took substantial modification to work. I'm providing my answer as a complete, well-formed query (data included) to make it easy to test.
Note that declare context item is a new addition in XQuery 3.0.
declare context item := document { <productos>
<TITULO>DATOS DE LA TABLA PRODUCTOS</TITULO>
<produc>
<cod_prod>1010</cod_prod>
<denominacion>Placa Base MSI G41M-P26</denominacion>
<precio>50</precio>
<stock_actual>10</stock_actual>
<stock_minimo>3</stock_minimo>
<cod_zona>10</cod_zona>
</produc>
<produc>
<cod_prod>1011</cod_prod>
<denominacion>Micro Intel Core i5-2320</denominacion>
<precio>120</precio>
<stock_actual>3</stock_actual>
<stock_minimo>5</stock_minimo>
<cod_zona>10</cod_zona>
</produc>
</productos>
};
declare variable $words := ("Placa Base", "Micro", "Memoria");
for $zone in /productos/produc
for $word in $words
let $placa := $zone/denominacion[contains(., $word)]
where $placa
return <placa word="{$word}">{data($placa)}</placa>
Note that a for expression is useless if you then ignore its results and refer to the root again. That is to say, if you're for $zone in /productos/produc, then refer to $zone, not /productos/produc, inside.

Answer 2

let $placa := /productos/produc[contains(lower-case(.),"placa")]/denominacion
let $micro := /productos/produc[contains(lower-case(.),"micro")]/denominacion
let $mem := /productos/produc [ contains (lower-case(.),"memoria")]/denominacion
let $altres := /productos/produc[ contains(lower-case (.),"hd")]/denominacion
let $altres1 := /productos/produc[ contains(lower-case (.),"tarjeta")]/denominacion
return
<placas>
<placa>{ $placa }</placa>
<micro>{ $micro }</micro>
<memoria>{ $mem }</memoria>
<altres>{ $altres }</altres>
<altres>{ $altres1 }</altres>
</placas>