Task 738: .TSV File Format
Task 738: .TSV File Format
File Format Specifications for the .TSV File Format
The .TSV (Tab-Separated Values) file format is a straightforward text-based format primarily intended for storing and exchanging tabular data. Each record in the data is represented as a single line, with individual fields separated by a horizontal tab character (U+0009). The format does not mandate a specific header, footer, or magic number, and it supports variable numbers of fields per record, though consistency across records is typical for practical use. It is analogous to the comma-separated values (CSV) format but employs tabs to mitigate issues arising from fields containing delimiters. Additional conventions may include an optional header row for column names and quoting of fields (often with double quotes) to encapsulate tabs or newlines within values, although these features are not universally standardized. The format is registered with the Internet Assigned Numbers Authority (IANA) under the MIME type text/tab-separated-values, and it is commonly encoded in UTF-8 for compatibility with modern systems.
1. List of All Properties of This File Format Intrinsic to Its File System
The .TSV file format, being a plain text format, does not impose format-specific metadata or structures on the file system beyond standard file handling. The intrinsic properties refer to the standard file system metadata associated with any file, including .TSV files, as maintained by operating systems (e.g., via the stat system call in Unix-like systems). These properties are as follows:
- Device ID: The identifier of the device containing the file.
- Inode number: A unique identifier for the file within the file system.
- File mode: The file type and permissions (e.g., read, write, execute for owner, group, and others), often represented in octal notation.
- Number of hard links: The count of hard links pointing to the file.
- User ID of owner: The numeric ID of the user owning the file.
- Group ID of owner: The numeric ID of the group owning the file.
- Special device ID: The device identifier if the file is a special file (otherwise 0).
- File size: The size of the file in bytes.
- Block size: The preferred block size for file system I/O operations.
- Number of blocks: The number of allocated blocks for the file.
- Last access time: The timestamp of the last file access.
- Last modification time: The timestamp of the last content modification.
- Last status change time: The timestamp of the last metadata change.
These properties are accessible through system APIs and are independent of the .TSV content structure.
2. Two Direct Download Links for Files of Format .TSV
- https://getsamplefiles.com/download/tsv/sample-1.tsv
- https://raw.githubusercontent.com/ibm-watson-data-lab/open-data/master/movies/movies.tsv
3. Ghost Blog Embedded HTML JavaScript for Drag-and-Drop .TSV File
The following is an embeddable HTML and JavaScript snippet suitable for integration into a Ghost blog post (e.g., via a custom HTML block). It creates a drag-and-drop zone that accepts a .TSV file and displays the available file system properties (limited to those accessible in a browser environment via the File API, such as name, size, type, and last modified time). Full file system metadata (e.g., inode or permissions) is not available in browser contexts due to security restrictions.
4. Python Class for Handling .TSV Files
The following Python class can open a .TSV file, decode (parse) its content into a list of lists, read and write the data, and print the file system properties to the console.
import os
class TsvHandler:
def __init__(self, filename):
self.filename = filename
self.data = None
def read(self):
"""Decode and read the TSV file into a list of lists."""
with open(self.filename, 'r', encoding='utf-8') as f:
self.data = [line.strip().split('\t') for line in f if line.strip()]
def write(self, data=None):
"""Write the data (list of lists) back to the TSV file."""
if data is None:
data = self.data
with open(self.filename, 'w', encoding='utf-8') as f:
for row in data:
f.write('\t'.join(row) + '\n')
def print_properties(self):
"""Print all file system properties to the console."""
st = os.stat(self.filename)
print(f"Device ID: {st.st_dev}")
print(f"Inode number: {st.st_ino}")
print(f"File mode: {oct(st.st_mode)}")
print(f"Number of hard links: {st.st_nlink}")
print(f"User ID: {st.st_uid}")
print(f"Group ID: {st.st_gid}")
print(f"Special device ID: {st.st_rdev}")
print(f"File size: {st.st_size}")
print(f"Block size: {st.st_blksize}")
print(f"Number of blocks: {st.st_blocks}")
print(f"Access time: {st.st_atime}")
print(f"Modification time: {st.st_mtime}")
print(f"Change time: {st.st_ctime}")
5. Java Class for Handling .TSV Files
The following Java class can open a .TSV file, decode (parse) its content into a list of arrays, read and write the data, and print the file system properties to the console. Note that full POSIX properties are accessible only on Unix-like systems.
import java.io.*;
import java.nio.file.*;
import java.nio.file.attribute.*;
import java.util.*;
public class TsvHandler {
private String filename;
private List<String[]> data;
public TsvHandler(String filename) {
this.filename = filename;
this.data = null;
}
public void read() throws IOException {
data = new ArrayList<>();
try (BufferedReader br = new BufferedReader(new FileReader(filename))) {
String line;
while ((line = br.readLine()) != null) {
if (!line.trim().isEmpty()) {
data.add(line.split("\t"));
}
}
}
}
public void write() throws IOException {
try (BufferedWriter bw = new BufferedWriter(new FileWriter(filename))) {
for (String[] row : data) {
bw.write(String.join("\t", row));
bw.newLine();
}
}
}
public void printProperties() throws IOException {
Path path = Paths.get(filename);
BasicFileAttributes attr = Files.readAttributes(path, BasicFileAttributes.class);
System.out.println("Creation time: " + attr.creationTime());
System.out.println("Last access time: " + attr.lastAccessTime());
System.out.println("Last modification time: " + attr.lastModifiedTime());
System.out.println("File size: " + attr.size());
// POSIX-specific properties (Unix-like systems)
if (Files.getFileStore(path).supportsFileAttributeView(PosixFileAttributeView.class)) {
PosixFileAttributes posix = Files.readAttributes(path, PosixFileAttributes.class);
System.out.println("User ID (owner): " + posix.owner().getName());
System.out.println("Group ID (owner): " + posix.group().getName());
System.out.println("Permissions (mode): " + PosixFilePermissions.toString(posix.permissions()));
// Inode and other low-level properties require native extensions or are not directly exposed.
}
// Note: Properties like inode, device ID, and block count require platform-specific handling or native code.
}
}
6. JavaScript Class for Handling .TSV Files
The following JavaScript class (for Node.js) can open a .TSV file, decode (parse) its content into an array of arrays, read and write the data, and print the file system properties to the console.
const fs = require('fs');
class TsvHandler {
constructor(filename) {
this.filename = filename;
this.data = null;
}
read() {
const content = fs.readFileSync(this.filename, 'utf8');
this.data = content.split('\n')
.filter(line => line.trim())
.map(line => line.split('\t'));
}
write() {
const content = this.data.map(row => row.join('\t')).join('\n');
fs.writeFileSync(this.filename, content + '\n');
}
printProperties() {
const st = fs.statSync(this.filename);
console.log(`Device ID: ${st.dev}`);
console.log(`Inode number: ${st.ino}`);
console.log(`File mode: ${st.mode.toString(8)}`);
console.log(`Number of hard links: ${st.nlink}`);
console.log(`User ID: ${st.uid}`);
console.log(`Group ID: ${st.gid}`);
console.log(`Special device ID: ${st.rdev}`);
console.log(`File size: ${st.size}`);
console.log(`Block size: ${st.blksize}`);
console.log(`Number of blocks: ${st.blocks}`);
console.log(`Access time: ${st.atime.toISOString()}`);
console.log(`Modification time: ${st.mtime.toISOString()}`);
console.log(`Change time: ${st.ctime.toISOString()}`);
}
}
7. C Class for Handling .TSV Files
The following C++ class (as "C class" typically implies C++ for object-oriented features) can open a .TSV file, decode (parse) its content into a vector of vectors, read and write the data, and print the file system properties to the console. Required headers: <iostream>, <vector>, <string>, <fstream>, <sstream>, <sys/stat.h>, <iomanip> (for octal output).
#include <iostream>
#include <vector>
#include <string>
#include <fstream>
#include <sstream>
#include <sys/stat.h>
#include <iomanip>
class TsvHandler {
private:
std::string filename;
std::vector<std::vector<std::string>> data;
public:
TsvHandler(const std::string& fn) : filename(fn) {}
void read() {
std::ifstream file(filename);
if (!file) return;
data.clear();
std::string line;
while (std::getline(file, line)) {
if (line.empty()) continue;
std::vector<std::string> row;
std::stringstream ss(line);
std::string field;
while (std::getline(ss, field, '\t')) {
row.push_back(field);
}
data.push_back(row);
}
}
void write() {
std::ofstream file(filename);
if (!file) return;
for (const auto& row : data) {
for (size_t i = 0; i < row.size(); ++i) {
file << row[i];
if (i < row.size() - 1) file << '\t';
}
file << '\n';
}
}
void printProperties() {
struct stat st;
if (stat(filename.c_str(), &st) == 0) {
std::cout << "Device ID: " << st.st_dev << std::endl;
std::cout << "Inode number: " << st.st_ino << std::endl;
std::cout << "File mode: " << std::oct << st.st_mode << std::endl;
std::cout << "Number of hard links: " << st.st_nlink << std::endl;
std::cout << "User ID: " << st.st_uid << std::endl;
std::cout << "Group ID: " << st.st_gid << std::endl;
std::cout << "Special device ID: " << st.st_rdev << std::endl;
std::cout << "File size: " << st.st_size << std::endl;
std::cout << "Block size: " << st.st_blksize << std::endl;
std::cout << "Number of blocks: " << st.st_blocks << std::endl;
std::cout << "Access time: " << st.st_atime << std::endl;
std::cout << "Modification time: " << st.st_mtime << std::endl;
std::cout << "Change time: " << st.st_ctime << std::endl;
} else {
std::cerr << "Error retrieving file properties." << std::endl;
}
}
};