Complex table header IDs

PAC 2 Error

N/A (Requires human inspection)

Category

Checkpoint 15: Tables

Failure Condition

Matterhorn Protocol Checkpoint 15-004: A given cell’s header cannot be unambiguously determined.

Suggestion

For a simple table (same number of rows in each column and vice versa), the Scope property of each Header cell determines the associated Data cells. See Table header not tagged as a header

If the table is complex, a unique ID must be applied to each Header cell, and associated with each applicable Data cell. For a large table, this can be a time-consuming process:

  1. In Acrobat Pro, select the Touch Up Reading Order tool. Right-click the table and select the Table Editor.
  2. Using the Table Editor, right click a Header cell and select Table Cell Properties. In the Table Cell Properties dialog, set the Type to “Header Cell”, set the Scope property “None”, and assign a unique ID. If the cell spans multiple rows and/or multiple columns, set the Row Span and/or Column Span properties. Click OK.
  3. Repeat step 2 for each Header cell.
  4. Next, right click a Data cell and select Table Cell Properties. In the Table Cell Properties dialog, next to the box labeled “Associated Header Cell IDs”, click the ‘+’ symbol. In the Add Table Header ID dialog, click the down symbol next to the box labeled “Header ID”, and select the ID of a Header cell associated with this Data cell. Click OK. Repeat for each Header cell associated with this Data cell. If the cell spans multiple rows and/or multiple columns, set the Row Span and/or Column Span properties. Click OK.
  5. Repeat step 4 for each Data cell.

Example PDF with this error

Video version of this tutorial: