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Matting: Soft Edge Blob Soft Alpha (288px)

Soft-alpha cut-out (soft edges: soft-edge-blob) for alpha-matting / background-removal quality tests.

File: PNG · Matting Set · 288 × 288 px
Use case: Image mattingComputer vision· Paired fixture

Matting: Wispy Top Clean RGB (288px)

Clean RGB composite of the wispy-top soft-alpha subject on a neutral grey, paired input for matte extractors.

File: PNG · Matting Set · 288 × 288 px
Use case: Image matting· Paired fixture

Matting: Wispy Top Soft Alpha (288px)

Soft-alpha cut-out (hair edges: wispy-top) for alpha-matting / background-removal quality tests.

File: PNG · Matting Set · 288 × 288 px
Use case: Image mattingComputer vision· Paired fixture

Maven dependency:tree Output

Maven's dependency tree, complete with the [INFO] log prefix that has to be stripped before the tree can be read and the five-part coordinate form Maven uses. Every package, version, hash and licence is fictional: the tree describes nothing real.

File: TXT · Graphs
Use case: Log parsingGraph data+1· Conversion set

MBOX Mailbox (three-message thread)

An mbox mailbox concatenating a short three-message email thread with the classic 'From ' separator lines and >From body escaping, for testing mailbox splitting and thread reconstruction.

File: MBOX · Messages
Use case: Email parsingConversion testing

MBOX Mailbox: six-message thread

A larger mbox mailbox with a six-message back-and-forth thread, for testing mailbox splitting, thread reconstruction, and pagination over more than a couple of messages.

File: MBOX · Mailbox
Use case: Email parsingConversion testing

MBOX: Four Charsets and Both Transfer Encodings

One mailbox whose four messages each use a different charset and alternate between quoted-printable and base64, with RFC 2047 subjects to match. The file itself is LF-stored while the encoded payloads decode to CRLF text: the split every importer has to handle.

File: MBOX · Mailbox
Use case: Email parsingEncoding detection+1· Conversion set

MBOX: Thread Plus Its Bounce, With mboxrd Escaping

Three messages in one mailbox: an original whose body contains both a bare "From " line and an already-escaped ">From " line, the reply that threads to it, and the multipart/report bounce that reply triggered. mboxrd escaping is what makes the round trip lossless.

File: MBOX · Mailbox
Use case: Email parsingError handling+1· Conversion set

MBTiles: Raster Tile Pyramid, Zoom 4 to 8

A small raster tile pyramid covering the invented territory, one flat colour per zoom level so a wrongly addressed tile is obvious on sight. The row axis follows the TMS convention, which is flipped relative to the XYZ scheme web maps use: the single most common reason an MBTiles layer renders upside down.

File: MBTILES · Geopackage
Use case: GeospatialData import+1· Conversion set

MBTiles: Structurally Valid Tileset With No Tiles

Every required MBTiles table and metadata key, and not one tile row. This is what a failed or interrupted tile build actually produces, and it is the fixture that finds code which reports success because the file opened and the schema validated.

File: MBTILES · Geopackage
Use case: GeospatialError handling+1· Conversion set

MDL Molfile: Water (.mol)

An MDL Molfile (V2000) of a water molecule with standard geometry (a counts line, atom block with 2D coordinates, and bond block) for testing cheminformatics parsers and MOL/SDF converters.

File: MOL · Scientific
Use case: Scientific dataEditor testing· Conversion set

Measurement JSON Schema: Units as Annotations (.json)

A 2020-12 JSON Schema for the absorbance rows, carrying the physical unit and coverage factor as custom annotation keywords beside the standard type and range constraints. Annotations like these are ignored by validators and read by humans and tooling, which is precisely the contract being tested.

File: JSON · Measurements
Use case: Scientific dataSchema validation+1· Conversion set

Medical Consent Acknowledgment (HTML)

Checkbox consent + signature style medical acknowledgment for healthcare form testing. Fictional clinic.

File: HTML · Medical · 8 fields
Use case: Form testingForm parsing+1

Medical Consent AcroForm (SAMPLE)

Fillable fictional patient consent PDF for healthcare form tooling tests.

File: PDF · Acroform · 4 fields
Use case: Form testingPDF form filling+2

Medical Intake (Fillable PDF)

A fillable PDF patient-intake AcroForm: demographics, sex radios, reason-for-visit, allergies, medications, and a consent checkbox. A sample layout only. Never enter real medical data.

File: PDF · Acroform · 10 fields
Use case: Form testingPDF form filling+2

Meeting Action Items (CSV, SAMPLE)

CSV action-item export twin for the SAMPLE meeting notes.

File: CSV · Meeting · 3 rows
Use case: TemplatesCSV parsing· Conversion set

Meeting Agenda Template (DOCX)

A meeting agenda with objectives, a timed item table showing lead owners, and a preparation note: distinct from minutes, this is what you circulate before the meeting.

File: DOCX · Meeting Agenda
Use case: Templates

Meeting Agenda: Ops Sync (HTML, SAMPLE)

HTML SAMPLE meeting agenda for calendar/CMS tooling.

File: HTML · Agenda
Use case: TemplatesEditor testing· Conversion set

Meeting Invitation with iCalendar (EML)

A meeting-invitation email carrying an iCalendar (.ics) VEVENT with METHOD=REQUEST, for testing calendar-invite detection, ICS extraction, and RSVP handling.

File: EML · Calendar
Use case: Email parsingConversion testing

Meeting Minutes Template (DOCX)

A meeting-minutes template with attendees, a numbered agenda, and an action-items list.

File: DOCX · Meeting Minutes
Use case: Templates

Meeting Notes: Ops Sync (DOCX, SAMPLE)

SAMPLE meeting minutes DOCX with agenda, decisions, and action items.

File: DOCX · Meeting Notes
Use case: Templates· Conversion set

Meeting Notes: Ops Sync (Markdown, SAMPLE)

Markdown twin of the SAMPLE ops-sync meeting notes.

File: MD · Meeting Notes
Use case: TemplatesEditor testing· Conversion set

Melody: C Major Scale (WAV)

A two-second melody playing an ascending C-major scale (C4 to C5) with per-note envelopes: a simple musical signal for testing pitch detection, onset detection, and playback.

File: WAV · Signals · 2 s
Use case: Audio analysis

Merge Conflict - diff3 Marker Style With Base Section

The same conflict with `merge.conflictStyle=diff3`, which inserts the merge base between the two sides behind a row of pipes. Tools that split a conflict on `=======` alone silently fold the ancestor text into the ours side.

File: TXT · Merges · UTF-8
Use case: Error handlingVisual diff / regression+1· Conversion set