pptx/core-properties-full--last-modified-by

Metadata

XPath assertions

Render assertions

No render assertions declared.

Generator source

scripts/gen_core_properties_full_pptx.py

#!/usr/bin/env python3
"""Generate ``fixtures/pptx/core-properties-full--<field>.pptx`` fixtures.

Parameterised generator: one call per field under test. Mirrors the docx and
xlsx counterparts and satisfies ``features/pptx/core-properties-full.json``.

Fixtures are byte-reproducible: ``zip_date_time`` pins the zip-member clock to
2000-01-01, and ``dcterms:created`` / ``dcterms:modified`` are always pinned
to fixed ISO-8601 values so the embedded metadata doesn't drift.
"""

from __future__ import annotations

import argparse
import datetime as _dt
from pathlib import Path

from pptx import Presentation

_REPO_ROOT = Path(__file__).resolve().parent.parent
_REPRODUCIBLE_DT = _dt.datetime(2000, 1, 1, 0, 0, 0)

_PINNED_CREATED = _dt.datetime(2026, 1, 1, 0, 0, 0, tzinfo=_dt.timezone.utc)
_PINNED_MODIFIED = _dt.datetime(2026, 1, 2, 0, 0, 0, tzinfo=_dt.timezone.utc)


def _apply(prs, field: str, value: str) -> None:
    cp = prs.core_properties
    cp.created = _PINNED_CREATED
    cp.modified = _PINNED_MODIFIED

    if field == "title":
        cp.title = value
    elif field == "subject":
        cp.subject = value
    elif field == "creator":
        cp.author = value
    elif field == "description":
        cp.comments = value
    elif field == "language":
        cp.language = value
    elif field == "keywords":
        cp.keywords = value
    elif field == "last-modified-by":
        cp.last_modified_by = value
    elif field == "revision":
        cp.revision = int(value)
    elif field == "category":
        cp.category = value
    elif field == "content-status":
        cp.content_status = value
    elif field == "created":
        cp.created = _dt.datetime.strptime(value, "%Y-%m-%dT%H:%M:%SZ").replace(
            tzinfo=_dt.timezone.utc
        )
    elif field == "modified":
        cp.modified = _dt.datetime.strptime(value, "%Y-%m-%dT%H:%M:%SZ").replace(
            tzinfo=_dt.timezone.utc
        )
    else:
        raise SystemExit(f"Unknown field id: {field!r}")


def main() -> int:
    parser = argparse.ArgumentParser()
    parser.add_argument("--field", required=True)
    parser.add_argument("--value", required=True)
    parser.add_argument(
        "--out",
        default=str(_REPO_ROOT / "fixtures" / "pptx" / "core-properties-full.pptx"),
    )
    args = parser.parse_args()

    out_path = Path(args.out)
    if not out_path.is_absolute():
        out_path = _REPO_ROOT / out_path

    prs = Presentation()
    # A single blank slide keeps the package minimal but valid.
    prs.slides.add_slide(prs.slide_layouts[6])
    _apply(prs, args.field, args.value)
    out_path.parent.mkdir(parents=True, exist_ok=True)
    prs.save(out_path, zip_date_time=_REPRODUCIBLE_DT)
    print(out_path)
    return 0


if __name__ == "__main__":
    raise SystemExit(main())

Manifest (expanded)

{
  "$schema": "../manifest.schema.json",
  "id": "pptx/core-properties-full--last-modified-by",
  "kind": "literal",
  "title": "Core properties (full DC + dcterms field set)",
  "format": "pptx",
  "category": "metadata",
  "summary": "Every Dublin Core and dcterms field exposed by docProps/core.xml, one field isolated per expanded case. Each case round-trips through python-pptx's Presentation.core_properties API.",
  "spec": {
    "source": "ecma-376-5-part-2",
    "clause": "11.1",
    "notes": "ECMA-376 Part 2 / ISO 29500-2 section 11 defines the OPC 'core-properties' part. It carries a mix of Dublin Core, dcterms, and MS-OPC-core elements. This manifest isolates each one in turn so each XPath assertion proves that particular field round-trips. dcterms:created / dcterms:modified are set to a fixed ISO-8601 UTC timestamp in the generator so the fixtures are byte-reproducible."
  },
  "fixtures": {
    "machine": "pptx/core-properties-full--last-modified-by"
  },
  "generator": {
    "python": "scripts/gen_core_properties_full_pptx.py",
    "arg_template": "--field {field.id} --value \"{field.value}\" --out fixtures/pptx/core-properties-full--{field.id}.pptx"
  },
  "_expansion": {
    "parent_id": "pptx/core-properties-full",
    "bindings": {
      "field": "last-modified-by"
    }
  },
  "assertions": [
    {
      "id": "core-last-modified-by-present",
      "part": "docProps/core.xml",
      "namespaces": {
        "cp": "http://schemas.openxmlformats.org/package/2006/metadata/core-properties",
        "dc": "http://purl.org/dc/elements/1.1/",
        "dcterms": "http://purl.org/dc/terms/"
      },
      "xpath": "//cp:lastModifiedBy",
      "must": "exist",
      "description": "The last-modified-by element must be present in docProps/core.xml."
    },
    {
      "id": "core-last-modified-by-value",
      "part": "docProps/core.xml",
      "namespaces": {
        "cp": "http://schemas.openxmlformats.org/package/2006/metadata/core-properties",
        "dc": "http://purl.org/dc/elements/1.1/",
        "dcterms": "http://purl.org/dc/terms/"
      },
      "xpath": "//cp:lastModifiedBy",
      "must": "equal",
      "value": "Bob Reviewer",
      "description": "The last-modified-by element's text must equal the supplied value."
    }
  ]
}