Unverified50% confidenceFactExact time
OPF (Open Packaging Format) is a core component of the EPUB specification; it is essentially an XML file, typically named content.opf but not required to be
1
Sources
50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
Related Entities
Related Claims
Partially VerifiedODF (Open Document Format) is an XML-based open document file format standard developed by the OASIS organization70% similarUnverifiedEPUB 是由国际数字出版论坛（IDPF，现并入 W3C）制定的开放标准，是目前最被广泛支持的非专有电子书格式66% similarUnverifiedCommon image metadata formats include EXIF, IPTC, and XMP.65% similarUnverifiedOpal 基于开源框架 OpenClaw 构建61% similarUnverifiedODF（OpenDocument Format）由OASIS标准组织于2005年发布，由Sun Microsystems主导60% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1004337API
curl https://kongchang.com/api/v1/knowledge/claims/1004337MCP
get_claim(id=1004337)