- BaseX-Talk - mailman.uni-konstanz.de

Re: [basex-talk] BaseX generate-id()
by Christian Grün 20 May '13

20 May '13

I’m not quite sure on what you were asking, but I noticed that the explanation of PRE and ID values in our Wiki was somewhat deficient. Please don‘t hesitate to have yet another look at the revised articles [1,2], which are hopefully more self-explanatory. If not, you are always invited to read the dissertation in more detail ;) [1] http://docs.basex.org/wiki/Database_Module#db:open-pre [2] http://docs.basex.org/wiki/Node_Storage _______________________________ On Mon, May 20, 2013 at 10:46 PM, James Wright <james.jw(a)hotmail.com> wrote: > How did I not notice this!! I have read through those modules so many times > now!! I think this is exactly what I was looking for. I expected there to be > some sort of persistent id because I skimmed the initial dissertation on > BaseX from several years ago and it talks about a persistent ID. In regards > to the 'pre' this ID represents the id of a node which 'hasn't' been > inserted yet but it does not necessarily denote the ID the node will take > when actually inserted... So whats the point? Is this more for internal > uses? Maybe I don't fully understand... > > Thanks for the quick reply! > > - James > >> From: christian.gruen(a)gmail.com >> Date: Mon, 20 May 2013 22:30:08 +0200 >> Subject: Re: [basex-talk] BaseX generate-id() >> To: james.jw(a)hotmail.com >> CC: basex-talk(a)mailman.uni-konstanz.de > >> >> Hi James, >> >> a node id generated via generate-id() is unique and the same during >> the runtime of a query. If you want to ensure that you are requesting >> the same nodes of a database, I recommend you to check out the >> node-id() and node-pre() functions of our database module [1]. >> >> Hope this helps, >> Christian >> >> [1] http://docs.basex.org/wiki/Database_Module >> ___________________________ >> >> On Mon, May 20, 2013 at 10:09 PM, James Wright <james.jw(a)hotmail.com> >> wrote: >> > In the W3C specs it says this method should generate the same ID for a >> > node >> > regardless of when its called. Is this how it is implemented in BaseX or >> > does it simply generate a random number? My testing seems to implicate >> > the >> > ladder. If it does generate the same ID for each node each time its run, >> > does it do ensure uniqueness at the db or resource level? >> > >> > Thx for your time. >> > - James >> > >> > _______________________________________________ >> > BaseX-Talk mailing list >> > BaseX-Talk(a)mailman.uni-konstanz.de >> > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk >> >

2 1

Redo logs. Feature
by Alexander Shpack 20 May '13

20 May '13

Hi Team! Oracle DB have very powerful feature for recovery operations http://docs.oracle.com/cd/B28359_01/server.111/b28310/onlineredo001.htm Is it possible to realize something similar?

2 1

BaseX generate-id()
by James Wright 20 May '13

20 May '13

In the W3C specs it says this method should generate the same ID for a node regardless of when its called. Is this how it is implemented in BaseX or does it simply generate a random number? My testing seems to implicate the ladder. If it does generate the same ID for each node each time its run, does it do ensure uniqueness at the db or resource level? Thx for your time.- James

2 1

XQuery question
by Marco Lettere 20 May '13

20 May '13

Hello all, sorry this email is not properly basex specific but rather XQuery related. What is the most correct, most efficient in general best way of treating sequences sequentially? In particular I have an XML describing a sequence of set operations that have to be applied sequentially to the contained sequences of <tem/>s resulting into a final set represented by a sequence of <item/>s. Unfortunately they are expressed as siblings (flat) rather than dependent nodes (nested hierarchy) which could be handled easily with recursion. As an example the following sequence shall add the first three items to the empty set then cut down the resulting set to only contain item 2 and 3 and finally remove item 2 from the set resulting in a final set containing only item 3. <set operator="UNION"> <item name="1"/> <item name="2"/> <item name="3"/> </set> <set operator="INTERSECT"> <item name="2"/> <item name="3"/> <item name="4"/> <item name="5"/> </set> <set operator="DIFFERENCE"> <item name="2"/> </set> I'd prefer to not have to alter the input data structure. Thanks a lot for any help, M.

3 4

Re: [basex-talk] BaseX-Talk Digest, Vol 41, Issue 28
by Francis Avila 20 May '13

20 May '13

Gosh, I've been up and down the commands list looking for this. I can't believe I missed it! Thanks! On May 19, 2013, at 5:00 AM, basex-talk-request(a)mailman.uni-konstanz.de wrote: > From: Dirk Kirsten <dk(a)basex.org> > Subject: Re: [basex-talk] Easy way to serialize a DB to files? > Date: May 18, 2013 4:09:15 PM CDT > To: basex-talk(a)mailman.uni-konstanz.de > > > Dear Francis, > > There is the Export command, which should do exactly what you want. Read more about it here: http://docs.basex.org/wiki/Commands#EXPORT > > Cheers, > Dirk -- Francis Avila Web Developer Dancing Mammoth, Inc. (Formerly PJ Doland Web Design, Inc.) E: favila(a)dancingmammoth.com http://dancingmammoth.com

2 1

Updated XQuery Higher-Order Function Signatures
by Christian Grün 20 May '13

20 May '13

Dear all, for all of you who are working with XQuery 3.0 higher-order functions, I’d like to point out that the official function signatures will be changed in the upcoming W3 XQuery spec. In particular, this means that your existing code may need to be updated. I have just updated our documentation [1] and the latest stable snapshots [2]; feel free to ask for more, Christian PS: I heard that some of you are waiting for the next release of BaseX? We are working hard to get it finished; it will finally cover all features of XQuery 3.0 and improved support for concurrent read/write operations. Stay tuned.. [1] http://docs.basex.org/wiki/Higher-Order_Functions [2] http://files.basex.org/releases/latest/

1 0

Easy way to serialize a DB to files?
by Francis Avila 18 May '13

18 May '13

Is there an easy way to save/export/serialize an entire database to the filesystem? (I don't mean CREATE BACKUP/RESTORE. I mean if you want to get plain XML files for something outside of BaseX.) I have been using this XQuery: let $base := 'some/path/' for $doc in db:open('dbname') let $fn := $base || document-uri($doc) let $dir := file:dir-name($fn) return ( if (not(file:exists($dir))) then file:create-dir($dir) else (), file:write($fn, $doc, map{"method":="xml"}) ) However this uses a large amount of memory so any large database needs to be manually partitioned into multiple XQueries. It seems like there should be a very simple way to do this. -- Francis Avila Web Developer Dancing Mammoth, Inc. (Formerly PJ Doland Web Design, Inc.) E: favila(a)dancingmammoth.com http://dancingmammoth.com

2 1

restxq annotations
by Florian Eckey 17 May '13

17 May '13

Hello, i am writing my own webapp with basex and i have a question concerning restxq annotations. Is it possible to write own restxq annotations? Because, there is no way to annotate xquery functions with security options. So, are there any tutorials to write own restxq annotations? regards Florian

2 2

Xpath not working but BaseX map view works fine (Issue or beginner question?)
by Oliver 17 May '13

17 May '13

Just importing the following XML fragment into a new database. It is not queriable for some reason. The following do not return anything: //representedOrganization db:open("item","item.xml")/document db:open("item","item.xml")/document/author/assignedEntity/representedOrganization ----- item.xml <?xml version="1.0" encoding="utf-8"?> <?xml-stylesheet href="http://www.fda.gov/oc/datacouncil/stylesheets/spl/spl.xsl" type="text/xsl"?> <document xmlns:voc="http://www.hl7.org/v3/voc" xmlns="urn:hl7-org:v3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="urn:hl7-org:v3 http://www.fda.gov/oc/datacouncil/schemas/spl/spl.xsd"> <id root="ABD6ECF0-DC8E-41DE-89F2-1E36ED9D6535"/> <code code="34391-3" codeSystem="2.16.840.1.113883.6.1" codeSystemName="LOINC" displayName="HUMAN PRESCRIPTION DRUG LABELING"/> <title mediaType="text/x-hl7-title+xml">RENESE® (polythiazide) TABLETS for Oral Administration</title> <effectiveTime value="20051214"/> <setId root="ABD6ECF0-DC8E-41DE-89F2-1E36ED9D6535"/> <versionNumber value="1"/> <author> <time/> <assignedEntity> <representedOrganization> <name>Pfizer Labs</name> </representedOrganization> </assignedEntity> </author> </document>

2 1

Custom Serializer in BaseX
by James Wright 17 May '13

17 May '13

Is it possible to write a custom serializer parser for BaseX?

2 1