After some research, I think the best answer is Xerces, as it implements all of XSD, is cross-platform and widely used. I’ve created a small Java project on github to validate from the command line using the default JRE parser, which is normally Xerces. This can be used on Windows/Mac/Linux. There is also a C++ … Read more
rake db:rollback STEP=1 Is a way to do this, if the migration you want to rollback is the last one applied. You can substitute 1 for however many migrations you want to go back. For example: rake db:rollback STEP=5 Will also rollback all the migration that happened later (4, 3, 2 and also 1). To … Read more
From the Differences Between DTDs and Schema section of the Converting a DTD into a Schema article: The critical difference between DTDs and XML Schema is that XML Schema utilize an XML-based syntax, whereas DTDs have a unique syntax held over from SGML DTDs. Although DTDs are often criticized because of this need to learn … Read more
Lets assume you want a data frame with the following schema: root |– k: string (nullable = true) |– v: integer (nullable = false) You simply define schema for a data frame and use empty RDD[Row]: import org.apache.spark.sql.types.{ StructType, StructField, StringType, IntegerType} import org.apache.spark.sql.Row val schema = StructType( StructField(“k”, StringType, true) :: StructField(“v”, IntegerType, false) … Read more
As defined in the MySQL Glossary: In MySQL, physically, a schema is synonymous with a database. You can substitute the keyword SCHEMA instead of DATABASE in MySQL SQL syntax, for example using CREATE SCHEMA instead of CREATE DATABASE. Some other database products draw a distinction. For example, in the Oracle Database product, a schema represents … Read more
the Microsoft XSD inference tool is a good, free solution. Many XML editing tools, such as XmlSpy (mentioned by @Garth Gilmour) or OxygenXML Editor also have that feature. They’re rather expensive, though. BizTalk Server also has an XSD inferring tool as well. edit: I just discovered the .net XmlSchemaInference class, so if you’re using .net … Read more
Mike Sherrill ‘Cat Recall’ gave an excellent answer. I’ll add simply one example: Postgres. Cluster = A Postgres Installation When you install Postgres on a machine, that installation is called a cluster. ‘Cluster’ here is not meant in the hardware sense of multiple computers working together. In Postgres, cluster refers to the fact that you … Read more
It is a very bad idea indeed to name anything Name. It seems to me that you need cascading comboboxes. You will need a little VBA. Two combo boxes called, say, cboLocation and cboNodes, on a forrm called, say, frmForm cboLocation RowSource: SELECT ID, [Name] FROM Locations ORDER BY [Name] ColumnCount: 2 ColumnWidths: 0;2.00cm ”The … Read more
You can spool the schema out to a file via SQL*Plus and dbms_metadata package. Then replace the schema name with another one via sed. This works for Oracle 10 and higher. sqlplus<<EOF set long 100000 set head off set echo off set pagesize 0 set verify off set feedback off spool schema.out select dbms_metadata.get_ddl(object_type, object_name, … Read more
They’re for allowing multiple markup languages to be combined, without having to worry about conflicts of element and attribute names. For example, look at any bit of XSLT code, and then think what would happen if you didn’t use namespaces and were trying to write an XSLT where the output has to contain “template”, “for-each”, … Read more