### Bug description

Word format doesn't respect PART and its contents in Quarto Book, they will be auto removed.

<img width="1103" alt="截屏2022-11-23 11 41 18" src="https://user-images.githubusercontent.com/12031874/203467265-7075d424-198a-4ef8-8d50-38d361593d19.png">


## reproduce

<https://github.com/XiangyunHuang/quarto-broken>  is a minimal Quarto book project which created from Quarto Book skeleton.  Only one more file `getting-started.qmd`  was added, its content as follow:

```
# getting started

hello
```


This is `_quarto.yml`

```
project:
  type: book

book:
  title: "quarto-test"
  author: "Jane Doe"
  date: "11/23/2022"
  chapters:
    - index.qmd
    - part: getting-started.qmd
      chapters:
        - intro.qmd
    - summary.qmd
    - references.qmd

bibliography: references.bib

format:
  html:
    theme: cosmo
  pdf:
    documentclass: book
  docx:
    toc: true
    toc-depth: 3
    crossref:
      chapters: true
```

## Session info

```
sessionInfo(package = c("knitr","rmarkdown"))
R version 4.2.2 (2022-10-31)
Platform: x86_64-apple-darwin17.0 (64-bit)
Running under: macOS Ventura 13.0.1

Matrix products: default
LAPACK: /Library/Frameworks/R.framework/Versions/4.2/Resources/lib/libRlapack.dylib

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

attached base packages:
character(0)

other attached packages:
[1] knitr_1.41     rmarkdown_2.18

loaded via a namespace (and not attached):
 [1] Rcpp_1.0.9      grDevices_4.2.2 ps_1.7.2        digest_0.6.30   later_1.3.0     jsonlite_1.8.3 
 [7] evaluate_0.18   datasets_4.2.2  rlang_1.0.6     utils_4.2.2     cli_3.4.1       rstudioapi_0.14
[13] graphics_4.2.2  base_4.2.2      tools_4.2.2     yaml_2.3.6      xfun_0.35       fastmap_1.1.0  
[19] compiler_4.2.2  processx_3.8.0  stats_4.2.2     htmltools_0.5.3 methods_4.2.2   quarto_1.2 
```

I use Quarto 1.2.269.

```
RStudio 2022.07.2+576 "Spotted Wakerobin" Release (e7373ef832b49b2a9b88162cfe7eac5f22c40b34, 2022-09-06) for macOS
Mozilla/5.0 (Macintosh; Intel Mac OS X 13_0_1) AppleWebKit/537.36 (KHTML, like Gecko) QtWebEngine/5.12.10 Chrome/69.0.3497.128 Safari/537.36
```



### Checklist

- [X] Please include a minimal, fully reproducible example in a single .qmd file? Please provide the whole file rather than the snippet you believe is causing the issue.
- [X] Please [format your issue](https://quarto.org/bug-reports.html#formatting-make-githubs-markdown-work-for-us) so it is easier for us to read the bug report.
- [X] Please document the RStudio IDE version you're running (if applicable), by providing the value displayed in the "About RStudio" main menu dialog?
- [X] Please document the operating system you're running. If on Linux, please provide the specific distribution.
2022-11-23T04:06:37Z
XiangyunHuang
bug docx
Future
open
Word format doesn't respect PART and its contents in Quarto Book
https://github.com/quarto-dev/quarto-cli/issues/3434