BaseX-Talk

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5252 discussions

URLs for BaseX Documents and resolve-uri()
by Eliot Kimber 17 Apr '15

17 Apr '15

I'm migrating XSLT functions for working with DITA documents to XQuery. As part of this function package I have functions that resolve URI references from one document to another. This involves creating absolute URLs from relative URLs using a document or element as the base URI context. The problem I'm running into is that the URLs used within BaseX are not absolute (that is, they don't start with "/". For example, document-uri(root($node)) returns: dfst^dfst-sample-project^develop/docs/tests/complex_map/complex_map.ditamap not /dfst^dfst-sample-project^develop/docs/tests/complex_map/complex_map.ditama p This causes a problem for resolve-uri(), used like this: resolve-uri($topicResourcePart, base-uri($topicref)) This fails under BaseX: [FORG0002] Base URI is not absolute: "dfst^dfst-sample-project^develo.... These libraries are intended to be generic XQuery so I'm trying to avoid having any BaseX-specific logic in these functions. Is there workaround or other solution to this? Obviously, this way of representing document URIs internally is not something that could be easily changed but it is definitely a problem in terms of the expectations of URI handling by built-in XQuery functions. Thanks, Eliot ————— Eliot Kimber, Owner Contrext, LLC http://contrext.com

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Re: [basex-talk] URLs for BaseX Documents and resolve-uri()
by Eliot Kimber 17 Apr '15

17 Apr '15

Related question: is there a preferred way to determine from within an XQuery function that the current XQuery engine is BaseX? I know I could look to see if a particular BaseX-specific function exists but I was looking for something either more obvious or more general from an XQuery standpoint. Cheers, Eliot ————— Eliot Kimber, Owner Contrext, LLC http://contrext.com On 4/17/15, 10:51 AM, "Eliot Kimber" <ekimber(a)contrext.com> wrote: >I'm migrating XSLT functions for working with DITA documents to XQuery. As >part of this function package I have functions that resolve URI references >from one document to another. This involves creating absolute URLs from >relative URLs using a document or element as the base URI context. > >The problem I'm running into is that the URLs used within BaseX are not >absolute (that is, they don't start with "/". > >For example, document-uri(root($node)) returns: > >dfst^dfst-sample-project^develop/docs/tests/complex_map/complex_map.ditama >p > > >not > >/dfst^dfst-sample-project^develop/docs/tests/complex_map/complex_map.ditam >a >p > >This causes a problem for resolve-uri(), used like this: > >resolve-uri($topicResourcePart, base-uri($topicref)) > > >This fails under BaseX: > >[FORG0002] Base URI is not absolute: "dfst^dfst-sample-project^develo.... > > >These libraries are intended to be generic XQuery so I'm trying to avoid >having any BaseX-specific logic in these functions. > >Is there workaround or other solution to this? > >Obviously, this way of representing document URIs internally is not >something that could be easily changed but it is definitely a problem in >terms of the expectations of URI handling by built-in XQuery functions. > >Thanks, > >Eliot >————— >Eliot Kimber, Owner >Contrext, LLC >http://contrext.com > > > >

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"Input is too large for a single database" error
by Huib Verweij 17 Apr '15

17 Apr '15

Hi Christian, congrats on the new release. I’ve downloaded it yesterday and while importing new data BaseX ran into a “Input is too large for a single database” error. It has been reported before and you mentioned Basex will be using 2^63 bits instead of 2^31 bits for counting nodes. Is there a branch that I could check out that already supports importing up to 2^63 nodes? The “node-counter” branch perhaps? For now I’ll just split the data and see if that works. Hartelijke groet, Huib Verweij

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Is -L command-line option still supported?
by Amanda Galtman 16 Apr '15

16 Apr '15

Hi, The page http://docs.basex.org/wiki/Command-Line_Options lists an option "-L". However, it doesn't seem to work in version 8 and the "-h" output no longer mentions it. Was the -L option removed, perhaps because of changes in the serialization in version 8? This isn't holding up my work. I just came across it and wondered if the documentation needs an update. Cheers, Amanda

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Released: BaseX 8.1.1. Upcoming: Finger trees
by Christian Grün 16 Apr '15

16 Apr '15

Hi all, BaseX 8.1.1 has just been released [1]. It mostly contains minor bug fixes, all of them uncritical. Since recently, our XQuery arrays are based on a Finger tree implementation [2]. This fancy data structure provides much better performance for insert and delete operations. With BaseX 8.2, this data structure is now used for arbitrary sequences. If you want to belong to our early testers, please check out the latest snapshot [3]. We are looking for your feedback! Have fun, Christian [1] http://basex.org/download [2] https://en.wikipedia.org/wiki/Finger_tree [3] http://files.basex.org/releases/latest

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Way to React To Updates Using XQuery?
by Eliot Kimber 16 Apr '15

16 Apr '15

As part of my DITA link management system, I need to create and update various indexes and data structures whenever specific documents are added or updated. I was looking for some sort of trigger or event handler by which I would register an XQuery function and the system would call it on add, update, or delete, but I didn't see anything like that in the docs. Since my updates are, in my case, being driven by git commit hooks I could have the commit hook call a function following updates and pass that function the list of added, updated, and deleted docs. But that would not support the case where documents were loaded by some other route. Is such a mechanism available? Thanks, Eliot ————— Eliot Kimber, Owner Contrext, LLC http://contrext.com

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Xquery update performance on Base 8.1
by Erol Akarsu 15 Apr '15

15 Apr '15

Hello, I am having noticeable performance degradation for updating existing database in this function with Basex 81. I can say this function never finish with 81. But when I replace nodes call with file:append (writing result to a file), I can see it is slowness. But Basex_79 is much faster than Basex81 with regard to this update and finish this function quickly without any issue. I like to upgrade to 81 but because of this issue I could not. Can you help me? declare %updating function local:addCRMSegmentsIntoProducts () { let $allProds := fn:doc("AccumulatedProducts") let $segments := ("Aburcubur","Ãay_Kahve","Ä°Ã§ecek","Karma_Az","Meyve_Sebze","SaÃ§_BakÄ±m","SÃ¼t_Su-Madeaze_TÃ¼ketim","Temizlik") let $productsMap := map:new( for $rec in $allProds//doc let $prodIDField := $rec/field[@name eq "ProductID"] let $pid := $prodIDField/text() return map:entry($pid,$prodIDField)) for tumbling window $prodGroup in fn:doc("CRMSegments")//record start $first next $second when fn:true() end $last next $beyond when $last/PRODUCT_ID ne $beyond/PRODUCT_ID let $pid := $prodGroup[1]/PRODUCT_ID return let $prodEntry := map:get($productsMap,$pid)/.. return if (fn:empty($prodEntry)) then () else let $segData := for $segGroup in $prodGroup let $sid := $segGroup/SON_SEGMENT/text() let $sid := fn:concat("10",fn:index-of($segments,$sid)) group by $sid return let $segAmount := sum($segGroup//AMOUNT/text()) let $segOrderCount := sum($segGroup//ORDER_COUNT) let $segFields := (<field name="SegAmount_{$sid}">{$segAmount}</field>, <field name="SegOrderCount_{$sid}">{$segOrderCount}</field>) return $segFields return insert nodes ($segData) as last into $prodEntry };

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A question about the type system
by Kristian Kankainen 15 Apr '15

15 Apr '15

Hello! I'm not sure whether this is a question relevant to BaseX or more generally to the XQuery community. Since I don't use other XQuery systems and it might be specific to the BaseX parser, I post it here first. Why can't I specify xs:positiveIntegers as literals? Or why can't I treat xs:integers as xs:positiveIntegers? Consider a simple function that takes a xs:positiveInteger as input: <code> xquery version "3.0" encoding "UTF-8"; declare namespace local = "local"; declare function local:positive( $input as xs:positiveInteger ) as xs:positiveInteger { $input }; </code> I get an error XPTY0004 Cannot treat xs:integer as xs:positiveInteger if I run it with a literal input, like this: <code> local:positive(2) </code> I get no error if I specify the type explicitly, like this: <code> local:positive(xs:positiveInteger(2)) </code> This feel very odd, since the type system is hierarchical and xs:positiveInteger is a subcase of xs:integer, I don't really see a problem of this kind of automatic casting of integer literals if they qualify the cast. Can you give any reflection on this? Best regards Kristian Kankainen

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IllegalMonitorStateException at org.basex.core.locks.DBLocking
by Simon Chatelain 14 Apr '15

14 Apr '15

Hello all, I have the following problem. Using: BaseX 8.1.1 beta cf713e2 (20150328.133759) Java 1.8.0_31 Windows 7 The context: I have several sources of data from which I receive XML documents. My application will create a collection for each of these sources and store each received document into the collection corresponding to the source, and then update some kind of metadata about the collection. The metadata of all collections are stored into a common collection. Each source is handled by a different thread. I am using an embedded BaseX, and access to it through LocalSession. Now the problem is that after a certain amount of time (not constant, could be seconds or minutes) there is some exceptions. Either: java.lang.IllegalMonitorStateException at org.basex.core.locks.DBLocking.acquire and org.basex.core.locks.DBLocking.release Or: java.util.ConcurrentModificationException at org.basex.core.users.User.find I put the full stack trace in attachment. I build a test application that mimic what happens in the real application and it seems to exhibit the same problem. The source of this test application is attached My question: Am I doing something wrong, or is there a bug in BaseX? Thanks a lot Simon

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Re: [basex-talk] Mystery Failure on REPLACE but Not ADD
by Eliot Kimber 13 Apr '15

13 Apr '15

It's definitely a function of my local .basex settings. If I revert to the default settings (make the basex install dir .basexhome and remove ~/.basex) then the replace succeeds. Trying to figure out what the setting is that results in the failure. Cheers, E. ————— Eliot Kimber, Owner Contrext, LLC http://contrext.com On 4/12/15, 11:36 AM, "Eliot Kimber" <ekimber(a)contrext.com> wrote: >Using the basex Zip distribution for both 8.0.3 and 8.1, I'm getting a >failure on REPLACE but not ADD for the same XML data. > >This command succeeds: > >basexclient -c "CHECK dfst_dfst-sample-project_master; OPEN >dfst_dfst-sample-project_master; ADD to dfst/metadata.xml ><dfst_metadata/>" > > >But this command fails > >basexclient -c "CHECK dfst_dfst-sample-project_master; OPEN >dfst_dfst-sample-project_master; REPLACE dfst/metadata.xml ><dfst_metadata/>" > >"..." (Line 1): Premature end of file. > > >This definitely worked in the past, so something must have changed on my >system. > >Obviously, the error message is not very helpful in this case. > >Any idea what the problem might be or how I would diagnose this failure? > >Thanks, > >E. > >————— >Eliot Kimber, Owner >Contrext, LLC >http://contrext.com > > > >

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