Two more test files below.

Note that an author field of book and mvbook needs to be inherited to both author and bookauthor of the child, and that a child should inherit fields from its *immediate* ancestor (in the example, the inbook entry should inherit "year: 1975" from its parent, not "year: 1970 [to] year: 1980" from its grandparent).


$ cat crossref-inbook-mvbook.biblatex
@comment{

crossref, directly from inbook to mvbook

}

@inbook{inbook-1,
    Crossref = {mvbook-1},
    Title = {Macbeth [title field of inbook-1]},
    Date = {1975},
    Volume = {3},
    Chapter = {7},
    Pages = {100-200},
}

@mvbook{mvbook-1,
    Author = {Shakespeare},
    Date = {1970/1980},
    Title = {Collected Works [title field of mvbook-1]},
    Location = {Location},
    Publisher = {Publisher},
    Volumes = {4},
}

---
references:

- type: chapter
id: inbook-1
title: Macbeth [title field of inbook-1]
container-title: Collected works [title field of mvbook-1]
author:
family: Shakespeare
container-author:
family: Shakespeare
issued:
year: 1975
volume: 3
chapter-number: 7
page: 100-200
number-of-volumes: 4
publisher: Publisher
publisher-place: Location

- type: book
id: mvbook-1
title: Collected works [title field of mvbook-1]
author:
family: Shakespeare
issued:
- year: 1970
- year: 1980
number-of-volumes: 4
publisher: Publisher
publisher-place: Location
...

$ cat crossref-nested.biblatex
@comment{

Nested crossreferences (see biber manual v 1.7)

}

@bookinbook{bookinbook-1,
    Crossref = {book-1},
    Title = {Macbeth [title field of bookinbook-1]},
    Chapter = {7},
    Pages = {100-200},
}

@inbook{inbook-1,
    Crossref = {book-1},
    Title = {Macbeth [title field of inbook-1]},
    Chapter = {7},
    Pages = {100-200},
}

@book{book-1,
    Crossref = {mvbook-1},
    Date = {1975},
    Title = {Tragedies [title field of book-1]},
    Volume = {3}
}

@mvbook{mvbook-1,
    Author = {Shakespeare},
    Date = {1970/1980},
    Title = {Collected Works [title field of mvbook-1]},
    Location = {Location},
    Publisher = {Publisher},
    Volumes = {4}
}

---
references:

- chapter-number: 7
  page: 100-200
  title: Macbeth [title field of bookinbook-1]
  volume-title: Tragedies [title field of book-1]
  container-title: Collected works [title field of mvbook-1]
  volume: 3
  id: bookinbook-1
  issued:
  - year: 1975
  author:
    family: Shakespeare
  container-author:
    family: Shakespeare
  number-of-volumes: 4
  publisher: Publisher
  type: book
  publisher-place: Location

- title: Macbeth [title field of inbook-1]
  volume-title: Tragedies [title field of book-1]
  container-title: Collected works [title field of mvbook-1]
  author:
    family: Shakespeare
  container-author:
    family: Shakespeare
  volume: 3
  chapter-number: 7
  page: 100-200
  id: inbook-1
  issued:
  - year: 1975
  number-of-volumes: 4
  publisher: Publisher
  type: chapter
  publisher-place: Location

- title: Tragedies [title field of book-1]
  container-title: Collected works [title field of mvbook-1]
  author:
    family: Shakespeare
  container-author:
    family: Shakespeare
  volume: 3
  id: book-1
  issued:
    year: 1975
  number-of-volumes: 4
  publisher: Publisher
  type: book
  publisher-place: Location

- title: Collected works [title field of mvbook-1]
  author:
    family: Shakespeare
  id: mvbook-1
  issued:
  - year: 1970
  - year: 1980
  number-of-volumes: 4
  publisher: Publisher
  type: book
  publisher-place: Location
...