PDF/X
PDF for Exchange
An ISO standard subset of PDF designed for reliable prepress graphics exchange in printing.
Technical Detail
In the PDF specification (ISO 32000-2:2020), pdf/x is implemented as a specialized object within the document's object graph. PDF files use a cross-reference table to index every object by byte offset, enabling random access without sequential parsing. This architecture allows pdf/x to be read, modified, or extracted independently of other document elements. The binary structure supports incremental saves, where changes append to the file without rewriting existing content.
Example
```javascript
// PDF/X: PDF manipulation example
import { PDFDocument } from 'pdf-lib';
const pdfDoc = await PDFDocument.load(fileBytes);
const pages = pdfDoc.getPages();
console.log(`Pages: ${pages.length}`);
```
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