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sn12 · 03-07-2012, 10:47 AM

Hi there everyone,

I am confused by an error that has come up in ePubCheck.
I prepared my epub in InDesign and converted it in Calibre. I then ran the converted file through the IDPF epub validator online. It returned two errors, which were similar to one another.

1. ERROR. content.opf. Line 22, position 114. Value of attribute 'id' is invalid; must be an XML name without colons.

and

2. ERROR. content.opf. Line 64, position 60. Value of attribute 'idref' is invalid; must be an XML name without colons.

If anyone has any thoughts on why these occurred and how I can alter my epub to fix these errors, I would be very grateful. I have worked on epubs in the past and never encountered this error.

Thank you!

03-07-2012, 10:47 AM	#1
sn12 Junior Member Posts: 2 Karma: 10 Join Date: Feb 2012 Device: None	ePub Validation Error Hi there everyone, I am confused by an error that has come up in ePubCheck. I prepared my epub in InDesign and converted it in Calibre. I then ran the converted file through the IDPF epub validator online. It returned two errors, which were similar to one another. 1. ERROR. content.opf. Line 22, position 114. Value of attribute 'id' is invalid; must be an XML name without colons. and 2. ERROR. content.opf. Line 64, position 60. Value of attribute 'idref' is invalid; must be an XML name without colons. If anyone has any thoughts on why these occurred and how I can alter my epub to fix these errors, I would be very grateful. I have worked on epubs in the past and never encountered this error. Thank you!