几天前我开始学习libxml2来解析Linux上的xml文档(Ubuntu 14.04)。但不幸的是,我有很多问题。
首先,当我使用函数xmlParseDoc()
时,我收到一条错误消息:
doc.xml:1:名称空间错误:未定义OAI-PMH上schemaLocation的名称空间前缀xsi。 /www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"
当我尝试通过xsd验证xml-document时,第二个是错误。但我认为这个错误是第一个问题的结果。这是一条错误消息:
doc.xml:1:元素OAI-PMH:架构有效性错误:元素' OAI-PMH':没有可用于验证根目录的匹配全局声明。
请大家帮忙解释一下我的错吗?
有parseFile()
函数:
bool parseFile(xmlDocPtr& doc, const char* filename) {
doc = xmlParseFile(filename);
if(doc == NULL) {
std::cout << "Document is not parsing successfully: " << filename << std::endl;
return false;
}
xmlNodePtr root = xmlDocGetRootElement(doc);
if(root == NULL) {
std::cout << "Empty document: " << filename << std::endl;
return false;
}
if(xmlStrcmp(root->name, (const xmlChar *)"OAI-PMH")) {
std::cout << "Document of the wrong type, root node != \"OAI-PMH\"" << std::endl;
return false;
}
return true;
}
有validateDoc()
功能:
void validateDoc(xmlDocPtr doc) {
std::cout << "Start to validate doc func\n";
xmlSchemaParserCtxtPtr schemaParser = xmlSchemaNewParserCtxt("http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd");
xmlSchemaPtr schema = xmlSchemaParse(schemaParser);
xmlSchemaValidCtxtPtr schemaValid = xmlSchemaNewValidCtxt(schema);
int result = xmlSchemaValidateDoc(schemaValid, doc);
std::cout << "Result: " << result << std::endl; // result is equal to 1845!
std::cout << "End validate doc func\n";
}
这是一个xml文档:
<OAI-PMH xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd>
<responseDate>2014-08-21T22:00:24.551Z</responseDate>
<request verb="Identify"/>
<Identify>
<repositoryName>Musketti KDK Data</repositoryName>
<baseURL>http://www.museot.fi/baseUrl</baseURL>
<protocolVersion>2.0</protocolVersion>
<adminEmail>noreply@museo.fi</adminEmail>
<earliestDatestamp>1900-01-01T00:00:00.000Z</earliestDatestamp>
<deletedRecord>no</deletedRecord>
<granularity>YYYY-MM-DDThh:mm:ssZ</granularity>
<compression>NoCompression</compression>
</Identify>
</OAI-PMH>
答案 0 :(得分:2)
您需要在XML中声明xsi
前缀才能使其有效:
<OAI-PMH xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
.....
.....
</OAI-PMH>