BaseX-Talk January 2017

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30 participants
33 discussions

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Images
by meumapple 03 Jan '17

03 Jan '17

Hi All, Is there a way to access images in BaseX as sequences of pixels? Thanks. Joseph

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Namespaces in element constructors
by Bridger Dyson-Smith 02 Jan '17

02 Jan '17

Hi all - I think that I weak grasp of the practical requirements, but I'm unable to find a reference in the spec to clarify what's happening in the following: I have a constructor: return( for $item in $file-list let $item-less := replace($item, '^\d{1,}-', '') (: returns "missing" supplemental files :) where ($item-less[(not(. = ($files-titles, $excludes)))]) or ($item-less[(. = $files-titles)]) return( <relatedItem> <title>{$item-less}</title> <mimeType> {if ($item-less = $files-titles) then ($content/files/file/name[. = $item-less]/following-sibling::mimetype/text()) else (fetch:content-type(concat(file:parent(document-uri($doc)),$item)))} </mimeType> <uri>{file:parent(document-uri($doc))}</uri> </relatedItem> ) ) and it works fine so long at the <relatedItem> is not namespaced. As soon as the <relatedItem> is namespaced; e.g. <relatedItem xmlns=" http://bridger.net">, then I need to use the following XPath in the `then` keyword: ($content/*:files/*:file/*:name[. = $item-less]/following-sibling::*:mimetype/text()) The input documents (in the SSCCE, under sample-data/*/metadata.xml) are not in a namespace. Would someone mind providing some context for the "why" here? I've been looking through Priscilla Walmsley's 2nd edition, and the specification, but haven't been able to find an answer. I'm almost certainly looking for the wrong thing(s). Any help will be greatly appreciated! Thank you in advance. Best, Bridger

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Schema Validation issues
by George Sofianos 02 Jan '17

02 Jan '17

Because of issues with schema validation (can't properly use doc() in the validate function - see https://github.com/BaseXdb/basex/issues/1324), I'm not using BaseX to do schema validation in my workflow. But I needed it today to make some result comparisons with my own implementation of XML Validator, and I noticed that using the beta Xerces version which is documented in the wiki <http://docs.basex.org/wiki/Validation_Module#XML_Schema_Validation> can make it crash, so I thought I should report it here. Other than that, I noticed one some XML files that it only reports fatal errors, and hides any other non-fatal error. I think it has something to do with the process <https://github.com/BaseXdb/basex/blob/86a12cf0c75010b3058c18f81c4689bc511b7…> method but I'm not sure.

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BaseX-Talk January 2017