This visualization displays annotation logs from a collaborative document curation effort, showing how different users marked up XML files with quality assessments. Each annotation is positioned along a horizontal axis representing character position within its source file, with rows or layers indicating different categories (incompleteness, credibility, imprecision, ignorance), certainty levels (low, medium, high, unknown), and annotators. Color encodes the annotation category while the vertical stacking reveals patterns in how different users (grzegorzb, jennifere, alexb, robertot, michalk, michelled) applied tags over time, with tooltips exposing dates, file IDs, and span lengths. The visualization makes it easy to compare annotation density across documents and see which types of uncertainty are most frequently flagged.