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Filter guide blocks by the layout's field position

Source: R/pdf_repair.R
dot-pumf_pdf_select_blocks.Rd

A user guide covering several linked files documents each of them in turn, so a shared respondent key (`RECID`, `PERSONID`) gets one block per module – each with that module's own frequencies. Keyed by name alone the first block wins, which then contradicts every other module's data file.

Usage

.pumf_pdf_select_blocks(pdf, layout)

Arguments

pdf

Parser output from [parse_pdf_freq_codebook()].

layout

Canonical layout tibble (name/start/end), or `NULL`.

Value

`pdf`, with `variables`/`codes`/`freqs`/`ranges` filtered to the surviving blocks.

Details

This is the cheap first pass: the block header prints `Position:` and `Length:`, and the command file's layout gives the same two numbers for this module, so a name documented at different offsets in different modules is resolved here. It cannot separate blocks that share an offset (every module's file starts `RECID` at position 1) – those go to [.pumf_pdf_resolve_duplicate_blocks()], which decides on the frequencies.