The critical apparatus (Latin: apparatus criticus) is the critical and primary source material that accompanies an edition of a text. A critical apparatus is often a by-product of textual criticism.
Given the definition from Wikipedia above, I would expect every apparatus resource to be tied to an edition of the text itself. However only ~36% of my resources tagged apparatus open showing a parallel resource for the actual text.
Among those missing the relationship are:
Charles, R. H. Pseudepigrapha of the Old Testament (Apparatuses). Logos Bible Software, 1913; 2004.
Josephus, Flavius, and Benedikt Niese. Works of Flavius Josephus: Critical Apparatus. Berolini: apvd Weidmannos, 1888–.
Charles, Robert Henry, ed. Apocrypha of the Old Testament (apparatuses). Bellingham, WA: Logos Bible Software, 2004.
Ottley, Richard R., ed. The Book of Isaiah According to the Septuagint (Codex Alexandrinus) (Critical Apparatus). Vol. 2. Cambridge: Cambridge University Press, 1906.
McRae, Calvin Alexander. The Hebrew Text of Ben Sira: Critical Notes. Toronto: Queen Printing Co., 1910.
Swete, Henry Barclay. The Old Testament in Greek: According to the Septuagint (Apparatus Alternative). Cambridge: Cambridge University Press, 1909.
Tischendorf, Constantin von, Caspar René Gregory, and Ezra Abbot, eds. Novum Testamentum Graece. Lipsiae: Giesecke & Devrient, 1869–1894.
Is Logos expecting to user to create the necessary parallel resource collections or are these items simply missed by Logos? If the former, I'll make a suggestion that Logos build these parallel relationships. If the latter, I'll make a suggestion that Logos audit all its type:Apparatus or type:Bible Apparatus resources for this error.