Welcome to Code by Zeba Academy.
A technical reference library for document engineering, digital publishing standards, and automated print pipelines.
Here you’ll find production-ready schemas, validator error solutions, and implementation specs for JATS XML, EPUB 3, ONIX 3.0, Pandoc workflows, and prepress standards; built for production editors, prepress operators, and publishing technologists.
Latest Articles
Thoughts, tutorials, and insights.
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· 5 min read
How SVG ViewBox and FXL Sizing: Fixing HTM_048 Warnings?
Read more →: How SVG ViewBox and FXL Sizing: Fixing HTM_048 Warnings?Fixed-layout (FXL) EPUB 3.3 publishing pipelines frequently encounter automated ingestion failure HTM_048: “SVG Fixed-Layout Documents must have a ‘viewBox’ attribute (on the outermost ‘svg’ element)”.…
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· 5 min read
How to Automate 3mm Bleed and Crop Marks with CSS @page?
Read more →: How to Automate 3mm Bleed and Crop Marks with CSS @page?Commercial sheetfed offset and print-on-demand (POD) finishing lines rely on mechanical guillotines operating at speeds exceeding 40 cuts per minute. Due to clamp compression, mechanical…
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· 5 min read
How to Transform JATS 1.3 Metadata to Crossref 5.3.1 XML?
Read more →: How to Transform JATS 1.3 Metadata to Crossref 5.3.1 XML?Ingesting NISO JATS 1.3 (ANSI/NISO Z39.96-2021) journal articles into the Crossref deposit engine presents an architectural data impedance mismatch. JATS organizes article metadata within the…
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· 5 min read
How to Resolve EPUBCheck HTM_004 and HTM_011 Entity Errors in EPUB 3?
Read more →: How to Resolve EPUBCheck HTM_004 and HTM_011 Entity Errors in EPUB 3?EPUB 3.3 defines XHTML Content Documents strictly as XML serializations conforming to the W3C Extensible Markup Language (XML) 1.0 (Fifth Edition) specification. Under XML 1.0…
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· 5 min read
How to Fix JATS4R Formula Schematron Failures
Read more →: How to Fix JATS4R Formula Schematron FailuresAutomated ingestion pipelines for biomedical and academic archives including PubMed Central (PMC), Europe PMC, and downstream indexing engines frequently reject submissions that pass standard Document…
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· 5 min read
The Memory Layout of Rust Enums: Discriminants, Niche Optimization, and Alignment
Read more →: The Memory Layout of Rust Enums: Discriminants, Niche Optimization, and AlignmentRust enum sizing equals the largest variant payload plus discriminant and trailing alignment padding. Ignoring variant balance bloats hot collections, blowing past L1 cache boundaries.…