Your Legacy Content,
Converted for the Digital World
Printed archives, legacy PDFs, and static documents represent years of intellectual and commercial value. S4Carlisle converts them into modern, structured, accessible digital formats, so that content can be searched, distributed, and used across every platform publishers need today.
INTRODUCTION
High-Volume Digital Conversion, Built for Publishing
We have been delivering digital conversion at scale for over a decade, processing over 4 million pages of digital output annually. Our AI-driven platform handles the heavy lifting of extraction and structuring, with rigorous quality assurance at every stage and human review wherever precision matters most.
WHAT WE OFFER
Digital Conversion Services
Digitisation
We convert physical documents and legacy print materials into high-fidelity, searchable digital files. Hard copies are scanned and transformed into structured PDFs, making your institutional content retrievable, indexable, and ready for digital distribution.
XML Conversion
We convert static documents into structured XML using industry-standard schemas, including JATS, BITS, and NLM, or custom DTDs built to your requirements. Structured XML makes content interoperable across platforms, databases, and archival systems, ensuring your metadata and body text remain accurately linked.
EPUB Conversion
We produce reflowable and fixed-layout ePUBs from a range of source formats, validated against IDPF standards and optimised for all major retail and library platforms. Interactive elements, accessibility features, and complex content, including equations and tables, are all handled correctly.
Print on Demand
We prepare titles for seamless integration with major print-on-demand networks, managing technical specifications for paper stock, binding, and cover requirements across different fulfilment partners. Titles remain continuously available without the cost and risk of physical inventory.
Cover File Optimisation
We prepare cover files to the exact specifications of each distribution platform, adjusting colour profiles, spine calculations, bleed, and safety margins for Amazon KDP, Lightning Source, IngramSpark, and others. The result is a consistent, accurate presentation across every channel.
Metadata Management
We optimise ONIX feeds, BISAC and Thema categorisations, and keyword structures to improve discoverability across retail and library platforms. Accurate, well-structured metadata ensures your titles surface in the right searches and reach the right readers.
WHY IT MATTERS
What Publishers Can Count On
Accuracy
Flawless conversion of complex content preserves data integrity and the author’s original meaning.
Speed
Accelerated workflows reduce production time, getting content to market faster.
Scale
Resources scale instantly to handle large backlist projects or high-volume seasonal programmes.
Accessibility
All digitised content can be produced to WCAG 2.1 AA and Section 508 standards.
Standards Compliance
Output meets industry requirements, including JATS, BITS, EPUB3, and ONIX.
Distribution Readiness
Output formats are optimised for upload to all major global platforms from day one.