Writing meta-data while document is open? 2007-12-03 - By Bruno Lowagie
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Howard Shank wrote:
> Hi Bruno/Paulo,
> In the iText Document class why is it not possible to add meta-data once
> the document is opened? Is this a technical limitation or a specific
> design limitation?
In the book, I explain the origin of this limitation.
When I wrote the first versions of iText, I developed
an HtmlWriter that wrote HTML simultaneously with PDF.
This was very useful in the debugging process: half
a PDF document is hard to read, but reading half an
HTML document is easy.
In HTML all meta data is written in the HEAD section
(before document.open()), not in the BODY (after
document.open()).
In PDF, it doesn't matter when you add the metadata.
In other words, there's a technical limitation, but
only for HtmlWriter.
> The reason I ask is in the RTF specification, it is possible to parse
> document text before encountering document meta-data. With that in mind
> for parsing RTF it is necessary to be able to write document content
> and/or meta-data at any time while parsing an existing document.
Hmm, you're right. Maybe we should find a way around
this problem.
br,
Bruno
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