Sparql Update query for edit value of a property

Question

i tried to update a value of a query in my DB on marmotta. I have a lot of resources like this:

<rdf:Description rdf:about="http://desktop-pqb3a65:8080/marmotta/resource/7e31bb9e-5dee-4f44-b082-9f770d465ea0">
<hasContentPath xmlns="http://www.kiwi-project.eu/kiwi/core/">D:\Software\Marmotta\marmotta-home\resources\56\cc\73\56cc736b-f597-47e8-9ffc-f37c3dbf66be</hasContentPath>
<about xmlns="http://schema.org/">Fondamenti di Informatica</about>
<name xmlns="http://schema.org/">Hello World!</name>
<author xmlns="http://schema.org/">EduOpen</author>
<audience xmlns="http://schema.org/">Qualsiasi</audience>
<actor xmlns="http://schema.org/">Gianni Vercelli</actor>
<description xmlns="http://schema.org/">Accenni storici sulla nascita del calcolatore</description>
<width xmlns="http://schema.org/"></width>
<height xmlns="http://schema.org/"></height>
<duration xmlns="http://schema.org/"></duration>
</rdf:Description>

I want to edit the hasContentPath field, i have a value like this:

D:\Software\Marmotta\marmotta-home\resources\56\cc\73\56cc736b-f597-47e8-9ffc-f37c3dbf66be

I'd like to edit and insert a value like :

resources\56\cc\73\56cc736b-f597-47e8-9ffc-f37c3dbf66be

Can you help me? i tried this query:

PREFIX schema:  <http://schema.org/>

DELETE { ?resource <http://www.kiwi-project.eu/kiwi/core/> 'D:\Software\Marmotta\marmotta-home\resources\56\cc\73\56cc736b-f597-47e8-9ffc-f37c3dbf66be' }
INSERT { ?resource <http://www.kiwi-project.eu/kiwi/core/> 'resources\56\cc\73\56cc736b-f597-47e8-9ffc-f37c3dbf66be' }
WHERE
{ ?resource schema:name 'Hello World!'
} 

Answer 1

Single \ in strings are for escape sequences. Unlike the linux shell, '' strings have escapes as well. \S is illegal as an escape — strictly speaking, that's a syntax error. It seems to be interpreted in some way, but it is unlikely to be the characters \ and S.