Título corto y referencia cruzada en incolección

Question

No consigo obtener el título corto de una colección (lo necesito después de la primera cita) cuando uso crossref.

El ejemplo no es exactamente mínimo (al menos para la bibliografía) porque no quería borrar la configuración personalizada que podría afectar el problema.

  % !BIB TS-program = biber
% !BIB program = biber
% !TEX encoding = UTF-8 Unicode
% !TeX TS-program = xelatexmk

\RequirePackage{filecontents}
\begin{filecontents}{pippo.bib}

@collection{Gag:Fil,
    Address = {Città del Vaticano},
    Date-Modified = {2018-06-08 17:40:35 +0000},
    Editor = {Mauro Gagliardi},
    Publisher = {Libreria Editrice Vaticana},
    Shorttitle = {Il Filioque},
    Title = {Il Filioque. A mille anni dal suo inserimento nel credo a Roma (1014-2014)},
    Year = {2015}}

@incollection{Oss:Mas,
    Author = {Carlo dell'Osso},
    Pages = {147-64},
    Crossref = {Gag:Fil},
    Title = {Il \textit{Filioque} in Massimo il Confessore}}


@incollection{Cip:Pro,
    Author = {Nello Cipriani},
    Pages = {99-116},
    Title = {La processione dello Spirito Santo in sant'Agostino},
    Crossref = {Gag:Fil}}

\end{filecontents}




\documentclass[A4, 11pt]{book}
\usepackage{fontspec}
\usepackage{polyglossia}                        % Per le sillabazioni
    \setmainlanguage{italian}

%%%%%%%%%%%%%%%%%%%COMANDI DI BILIOGRAFIA%%%%%%%%%%%%%%%%%%%%%%%%%%%
\usepackage[autostyle,italian=guillemets]{csquotes}
\usepackage{xpatch}     
\usepackage[style=verbose-trad2,            
            language=italian,
            useprefix=true,                 
            citepages=omit,                 
            backend=biber,  
            ibidpage=true,
        ]{biblatex} 

\NewBibliographyString{ibidemloccit,ibidemnoloccit}
\DefineBibliographyStrings{italian}{%
     idem   = {Id\adddot},
    idemsm = {Id\adddot},
    idemsf = {Ead\adddot},
    idemsn = {Id\adddot},
    idempm = {Id\adddot},
    idempf = {Id\adddot},
    idempn = {Id\adddot},
    idempp = {Id\adddot},
  ibidemloccit   = {\mkbibemph{\autocap{i}bidem}},
  ibidemnoloccit = {Ivi},
}

\xpatchbibmacro{author}
  {\printnames{author}}
  {\iffootnote
     {\ifthenelse{\ifciteidem\AND\NOT\boolean{cbx:noidem}}
       {\usebibmacro{cite:idem}}
       {\printnames{author}}}
     {\printnames{author}}}
  {}{}
\xpatchbibmacro{bbx:editor}
  {\printnames{editor}}
  {\iffootnote
     {\ifthenelse{\ifciteidem\AND\NOT\boolean{cbx:noidem}}
        {\usebibmacro{cite:idem}}
        {\printnames{editor}}}
     {\printnames{editor}}}
  {}{}
\xpatchbibmacro{bbx:translator}
  {\printnames{translator}}
  {\iffootnote
     {\ifthenelse{\ifciteidem\AND\NOT\boolean{cbx:noidem}}
        {\usebibmacro{cite:idem}}
        {\printnames{translator}}}
     {\printnames{translator}}}
  {}{}

\renewbibmacro*{cite:ibid}{%
  \printtext{%
    \bibhyperlink{cite\csuse{cbx@lastcite@\thefield{entrykey}}}{%
      \ifloccit
        {\bibstring[\mkibid]{ibidemloccit}%
         \global\toggletrue{cbx:loccit}}
        {\bibstring[\mkibid]{ibidemnoloccit}}}}}


%%%%%%%%%%%%%%%%%%%%%%%%%%%


\renewcommand*{\newunitpunct}{\addcomma\space}                              % Virgola tra le unità
\renewcommand*{\mkibid}{\emph}                                          % ibid, op cit e latinitates in enfatico

\renewbibmacro*{cite:title}{%                           Ciò che segue è per avere lo shorttitle alla seconda citazione (funge solo in trad2)
  \printtext[bibhyperlink]{%
    \printfield[citetitle]{labeltitle}%
    \setunit{\addspace}%
    \bibstring[\mkibid]{opcit}}}

    \DeclareFieldFormat[article, inbook, incollection, inproceedings]{citetitle}{\mkbibemph{#1}}        % e che resti in corsivo


\addbibresource{pippo.bib}


%%%%%%%%%%%%%%%%%%% INIZIO DOCUMENTO %%%%%%%%%%%%%%%%%%%%%%

\begin{document}

I want the short title of the collection from the second citation on   \\

Cito la collezione\footcite{Gag:Fil}\\

Dopo cito il contributo nella collezione\footcite{Oss:Mas}\\

E infine un altro contributo nella medesima collezione\footcite{Cip:Pro}


\end{document}

Answer 1

Hubo una pregunta similar hace un tiempo conbiblatex: evita información redundanteuna brillante respuesta dePablo Stanleyque fue convertido en un paquete porMaieul(biblatex-opcit-booktitle).

Con ese paquete cargado su MWE se convierte

\documentclass[a4paper,11pt]{book}
\usepackage{fontspec}
\usepackage{polyglossia}
    \setmainlanguage{italian}

\usepackage[autostyle,italian=guillemets]{csquotes}
\usepackage{xpatch}
\usepackage[style=verbose-trad2,
            useprefix=true,
            citepages=omit,
            backend=biber,
            ibidpage=true,
        ]{biblatex}
\usepackage{biblatex-opcit-booktitle}

\NewBibliographyString{ibidemloccit,ibidemnoloccit}
\DefineBibliographyStrings{italian}{%
    idem   = {Id\adddot},
    idemsm = {Id\adddot},
    idemsf = {Ead\adddot},
    idemsn = {Id\adddot},
    idempm = {Id\adddot},
    idempf = {Id\adddot},
    idempn = {Id\adddot},
    idempp = {Id\adddot},
  ibidemloccit   = {\mkbibemph{\autocap{i}bidem}},
  ibidemnoloccit = {Ivi},
}

\xpatchbibmacro{author}
  {\printnames{author}}
  {\iffootnote
     {\ifthenelse{\ifciteidem\AND\NOT\boolean{cbx:noidem}}
       {\usebibmacro{cite:idem}}
       {\printnames{author}}}
     {\printnames{author}}}
  {}{}
\xpatchbibmacro{bbx:editor}
  {\printnames{editor}}
  {\iffootnote
     {\ifthenelse{\ifciteidem\AND\NOT\boolean{cbx:noidem}}
        {\usebibmacro{cite:idem}}
        {\printnames{editor}}}
     {\printnames{editor}}}
  {}{}
\xpatchbibmacro{bbx:translator}
  {\printnames{translator}}
  {\iffootnote
     {\ifthenelse{\ifciteidem\AND\NOT\boolean{cbx:noidem}}
        {\usebibmacro{cite:idem}}
        {\printnames{translator}}}
     {\printnames{translator}}}
  {}{}

\renewbibmacro*{cite:ibid}{%
  \printtext{%
    \bibhyperlink{cite\csuse{cbx@lastcite@\thefield{entrykey}}}{%
      \ifloccit
        {\bibstring[\mkibid]{ibidemloccit}%
         \global\toggletrue{cbx:loccit}}
        {\bibstring[\mkibid]{ibidemnoloccit}}}}}


\renewcommand*{\newunitpunct}{\addcomma\space}
\renewcommand*{\mkibid}{\emph}

\renewbibmacro*{cite:title}{%
  \printtext[bibhyperlink]{%
    \printfield[citetitle]{labeltitle}%
    \setunit{\addspace}%
    \bibstring[\mkibid]{opcit}}}

    \DeclareFieldFormat[article, inbook, incollection, inproceedings]{citetitle}{\mkbibemph{#1}}

\begin{filecontents}[force]{\jobname.bib}
@collection{Gag:Fil,
    Address = {Città del Vaticano},
    Date-Modified = {2018-06-08 17:40:35 +0000},
    Editor = {Mauro Gagliardi},
    Publisher = {Libreria Editrice Vaticana},
    Shorttitle = {Il Filioque},
    Title = {Il Filioque. A mille anni dal suo inserimento nel credo a Roma (1014-2014)},
    Year = {2015}}
@incollection{Oss:Mas,
    Author = {Carlo dell'Osso},
    Pages = {147-64},
    Crossref = {Gag:Fil},
    Title = {Il \textit{Filioque} in Massimo il Confessore}}
@incollection{Cip:Pro,
    Author = {Nello Cipriani},
    Pages = {99-116},
    Title = {La processione dello Spirito Santo in sant'Agostino},
    Crossref = {Gag:Fil}}
\end{filecontents}
\addbibresource{\jobname.bib}

\begin{document}
I want the short title of the collection from the second citation on

Cito la collezione\footcite{Gag:Fil}

Dopo cito il contributo nella collezione\footcite{Oss:Mas}

E infine un altro contributo nella medesima collezione\footcite{Cip:Pro}

Cito la collezione\footcite{Gag:Fil}
\end{document}