Datasets:

lilbeee
/

ufo

Scanned 7,288 pages of native text-layer extraction (xberg + pdf_oxide) across the published data-no-ocr corpus. The signatures below are structural artifacts of native PDF text extraction (encoding shifts, missing inter-word spaces, junk text layers); genuinely scanned pages that fell to the OCR fallback cannot exhibit them.

45 page(s) flagged across 3 class(es):

class	severity	pages
noise-garbage	high	6
concatenation	medium	3
cmap-encoding-shift	high	2

noise-garbage (high) — 6 page(s)

file	page	chars	snippet
`aaro/aaro-hrr-vol1-2024.pdf`	4	4375	`International Security Environment and Technological Surprise ......................................`
`aaro/aaro-hrr-vol1-2024.pdf`	5	1247	`GNAT 750 ...........................................................................................`
`nara-osd/493468580/05_AARO_Historical_Record_Report.pdf`	5	1374	`05 GNAT 750 ........................................................................................`
`pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_3.pdf`	134	4096	`5000 4000 3000 2000 1000 600 300 200 100 50 40 30 20 10 50 40 30 20 10 50 40 30 20 10 50 40 30 20 10`
`pursue-01/pdfs/dow-uap-d48-report-september-1996.pdf`	5	2924	`Table of Contents 1. Introduction............................... 1 2. Examples Showing Need for Mode`
`pursue-01/pdfs/dow-uap-d48-report-september-1996.pdf`	6	2051	`Appendix A. Failure Response Modes in Program DAMP..................................................`

concatenation (medium) — 3 page(s)

file	page	chars	snippet
`pursue-01/pdfs/65_hs1-834228961_62-hq-83894_serial_130.pdf`	27	238	`教育政策与规划是国家对教育发展的指导和管理措施。政府通过制定教育政策，明确教育目标、任务和方向，以确保教育资源的合理配置和有效利用。教育政策与规划包括教育质量、教育投入、教育资源分配、教育创新、教育制度改革、教育管理创新等。教育政策与规划是`
`pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_7.pdf`	111	222	`词语“自立门户”指在没有政府或组织保护的情况下，自行建立自己的事业或经营单位`
`pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_8.pdf`	35	4229	`10\1\2\3\4\5\6\7\8\9\10\11\12\13\14\15\16\17\18\19\20\21\22\23\24\25\26\27\28\29\30\31\32\33\34\35\36\37\38\39\40\41\42\`

cmap-encoding-shift (high) — 2 page(s)

file	page	chars	snippet
`pursue-01/pdfs/65_hs1-834228961_62-hq-83894_section_1.pdf`	91	6752	`SUCCESS STORIES THE WORLD WAS MISSING A DREAM BUT WE WERE MISSING A DREAM BUT WE WERE MISSING A DREA`
`pursue-01/pdfs/dow-uap-d48-report-september-1996.pdf`	50	1695	`<HHtNn^cn^^inLn'sO^NNxxox^ooHHCNcjcn^J^^^^^^^c? OLnomomomQLnomomomomomomomoLCjQmQinomomom 18CMCMCMCM`